Abstract

A new yellow-emitting γ-Ca2SiO4:Ce3+,Li+ phosphor was synthesized via a solid-state reaction. The phosphor showed a strong yellow emission with a wide bandwidth of 135.4 nm under blue light excitation. Absorption and photoluminescence measurements and density functional theory calculations suggest that the luminescence of the phosphor can be attributed primarily to the transitions of 5d→4f (2F7/2 and 2F5/2) of Ce3+ ions occupying Ca(1) sites in the host crystal. White light-emitting diodes (LEDs) were fabricated by combining this phosphor with a blue LED, and excellent white light with a high color rendering index of 86 was created owing to the wide emission bandwidth of the phosphor.

© 2012 OSA

Full Article  |  PDF Article

References

  • View by:
  • |
  • |
  • |

  1. E. F. Schubert and J. K. Kim, “Solid-State Light Sources Getting Smart,” Science 308(5726), 1274–1278 (2005).
    [CrossRef] [PubMed]
  2. H. S. Jang, H. Yang, S. W. Kim, J. Y. Han, S.-G. Lee, and D. Y. Jeon, “White Light-Emitting Diodes with Excellent Color Rendering Based on Organically Capped CdSe Quantum Dots and Sr3SiO5:Ce3+,Li+ Phosphors,” Adv. Mater. (Deerfield Beach Fla.) 20(14), 2696–2702 (2008).
    [CrossRef]
  3. S. Nakamura and G. Fasol, The Blue Laser Diodes: GaN Based Light Emitters and Lasers (Springer, 1996).
  4. J. K. Park, M. A. Lim, C. H. Kim, H. D. Park, J. T. Park, and S. Y. Choi, “White light-emitting diodes of GaN-based Sr2SiO4:Eu and the luminescent properties,” Appl. Phys. Lett. 82(5), 683–685 (2003).
    [CrossRef]
  5. H. S. Jang and D. Y. Jeon, “Yellow-emitting Sr3SiO5:Ce3+,Li+ phosphor for white-light-emitting diodes and yellow-light-emitting diodes,” Appl. Phys. Lett. 90(4), 041906 (2007).
    [CrossRef]
  6. Y.-H. Won, H. S. Jang, W. B. Im, D. Y. Jeon, and J. S. Lee, “Tunable full-color-emitting La0.827Al11.9O19.09:Eu2+,Mn2+ phosphor for application to warm white-light-emitting diodes,” Appl. Phys. Lett. 89(23), 231909 (2006).
    [CrossRef]
  7. W. B. Im, Y. Fourré, S. Brinkley, J. Sonoda, S. Nakamura, S. P. DenBaars, and R. Seshadri, “Substitution of oxygen by fluorine in the GdSr2AlO5:Ce3+ phosphors: Gd1-xSr2+xAlO5-xFx solid solutions for solid state white lighting,” Opt. Express 17(25), 22673–22679 (2009).
    [CrossRef] [PubMed]
  8. R.-J. Xie, N. Hirosaki, N. Kimura, K. Sakuma, and M. Mitomo, “2-phosphor-converted white light-emitting diodes using oxynitride/nitride phosphors,” Appl. Phys. Lett. 90(19), 191101 (2007).
    [CrossRef]
  9. T. Suehiro, H. Onuma, N. Hirosaki, R.-J. Xie, T. Sato, and A. Miyamoto, “Powder Synthesis of Y-α-SiAlON and Its Potential as a Phosphor Host,” J. Phys. Chem. C 114(2), 1337–1342 (2010).
    [CrossRef]
  10. M. Krings, G. Montana, R. Dronskowski, and C. Wickleder, “α-SrNCN:Eu2+ - A Novel Efficient Orange-Emitting Phosphor,” Chem. Mater. 23(7), 1694–1699 (2011).
    [CrossRef]
  11. H. S. Jang, B.-H. Kwon, H. Yang, and D. Y. Jeon, “Bright three-band white light generated from CdSe/ZnSe quantum dot-assisted Sr3SiO5:Ce3+, Li+-based white light-emitting diode with high color rendering index,” Appl. Phys. Lett. 95(16), 161901 (2009).
    [CrossRef]
  12. J. Ziegler, S. Xu, E. Kucur, F. Meister, M. Batentschuk, F. Gindele, and T. Nann, “Silica-Coated InP/ZnS Nanocrystals as Converter Material in White LEDs,” Adv. Mater. (Deerfield Beach Fla.) 20(21), 4068–4073 (2008).
    [CrossRef]
  13. J. K. Park, C. H. Kim, S. H. Park, H. D. Park, and S. Y. Choi, “Application of strontium silicate yellow phosphor for white light-emitting diodes,” Appl. Phys. Lett. 84(10), 1647–1649 (2004).
    [CrossRef]
  14. H. S. Jang and D. Y. Jeon, “White light emission from blue and near ultraviolet light-emitting diodes precoated with a Sr3SiO5:Ce3+,Li+ phosphor,” Opt. Lett. 32(23), 3444–3446 (2007).
    [CrossRef] [PubMed]
  15. G. Blasse and B. C. Grabmaier, Luminescent Materials (Springer, 1994).
  16. M. P. Saradhi and U. V. Varadaraju, “Photoluminescence Studies on Eu2+-Activated Li2SrSiO4 - a Potential Orange-Yellow Phosphor for Solid-State Lighting,” Chem. Mater. 18(22), 5267–5272 (2006).
    [CrossRef]
  17. V. P. Dotsenko, S. M. Levshov, I. V. Berezovskaya, G. B. Stryganyuk, A. S. Voloshinovskii, and N. P. Efryushina, “Luminescent properties of Eu2+ and Ce3+ ions in strontium litho-silicate Li2SrSiO4,” J. Lumin. 131(2), 310–315 (2011).
    [CrossRef]
  18. H. He, R. Fu, H. Wang, X. Song, Z. Pan, X. Zhao, X. Zhang, and Y. Cao, “Li2SrSiO4:Eu2+ phosphor prepared by the Pechini method and its application in white light emitting diode,” J. Mater. Res. 23(12), 3288–3294 (2008).
    [CrossRef]
  19. R. Ye, G. Jia, D. Deng, Y. Hua, Z. Cui, S. Zhao, L. Huang, H. Wang, C. Li, and S. Xu, “Controllable Synthesis and Tunable Colors of α- and β-Zn2SiO4:Mn2+ Nanocrystals for UV and Blue Chip Excited White LEDs,” J. Phys. Chem. C 115(21), 10851–10858 (2011).
    [CrossRef]
  20. G. Li, D. Deng, X. Su, Q. Wang, Y. Li, Y. Hua, L. Huang, S. Zhao, H. Wang, C. Li, and S. Xu, “Sol-gel synthesis of yellow-emitting La4Ca(SiO4)3O:Ce3+ phosphors for white-light emitting diodes,” Mater. Lett. 65(13), 2019–2021 (2011).
    [CrossRef]
  21. P. V. Kelsey and J. J. Brown., “Ce3+-Activated Photoluminescence in the BaO-SrO-SiO2 system,” J. Electrochem. Soc. 123(9), 1384–1388 (1976).
    [CrossRef]
  22. J. Barbier and B. G. Hyde, “The Structures of the Polymorphs of Dicalcium Silicate, Ca2SiO4,” Acta Crystallogr. B 41(6), 383–390 (1985).
    [CrossRef]
  23. H. S. Jang, W. B. Im, D. C. Lee, D. Y. Jeon, and S. S. Kim, “Enhancement of red spectral emission intensity of Y3Al5O12:Ce3+ phosphor via Pr co-doping and Tb substitution for the application to white LEDs,” J. Lumin. 126(2), 371–377 (2007).
    [CrossRef]
  24. H. S. Jang, Y.-H. Won, S. Vaidyanathan, D. H. Kim, and D. Y. Jeon, “Emission band change of (Sr1-xMx)3SiO5:Eu2+ (M=Ca, Ba) Phosphor for White Light Sources Using Blue/Near-Ultraviolet LEDs,” J. Electrochem. Soc. 156(6), J138–J142 (2009).
    [CrossRef]
  25. G. Kresse and J. Hafner, “Ab initio molecular-dynamics simulation of the liquid-metal-amorphous-semiconductor transition in germanium,” Phys. Rev. B Condens. Matter 49(20), 14251–14269 (1994).
    [CrossRef] [PubMed]
  26. G. Kresse and J. Furthmüller, “Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set,” Phys. Rev. B Condens. Matter 54(16), 11169–11186 (1996).
    [CrossRef] [PubMed]
  27. B. Hammer, L. B. Hansen, and J. K. Nørskov, “Improved adsorption energetics within density-functional theory using revised Perdew–Burke–Ernzerhof functionals,” Phys. Rev. B 59(11), 7413–7421 (1999).
    [CrossRef]
  28. R. Czaya, “Refinement of the structure of γ-Ca2SiO4,” Acta Crystallogr. 27(4), 848–849 (1971).
    [CrossRef]
  29. M. Handke, “Vibrational Spectra, Force Constants, and Si-O Bond Character in Calcium Silicate Crystal Structure,” Appl. Spectrosc. 40(6), 871–877 (1986).
    [CrossRef]
  30. W. M. Yen, S. Shionoya, and H. Yamamoto, Phosphor Handbook, 2nd ed. (CRC Press, 2007).
  31. R. R. Jacobs, W. F. Krupke, and M. J. Weber, “Measurement of excited-state-absorption loss for Ce3+ in Y3Al5O12 and implications for tunable 5d→4f rare-earth lasers,” Appl. Phys. Lett. 33(5), 410–412 (1978).
    [CrossRef]
  32. N. Hirosaki, R.-J. Xie, K. Kimoto, T. Sekiguchi, Y. Yamamoto, T. Suehiro, and M. Mitomo, “Characterization and properties of green-emitting β-SiAlON:Eu2+ powder phosphors for white light-emitting diodes,” Appl. Phys. Lett. 86(21), 211905 (2005).
    [CrossRef]
  33. Y. Q. Li, N. Hirosaki, R.-J. Xie, T. Takeda, and M. Mitomo, “Yellow-Orange-Emitting CaAlSiN3:Ce3+ Phosphor: Sturcture, Photolumienscence, and Application in White LEDs,” Chem. Mater. 20(21), 6704–6714 (2008).
    [CrossRef]
  34. A. A. Setlur and A. M. Srivastava, “On the relationship between emission color and Ce3+ concentration in garnet phosphors,” Opt. Mater. 29(12), 1647–1652 (2007).
    [CrossRef]
  35. R. O. Jones and O. Gunnarsson, “The density functional formalism, its applications and prospects,” Rev. Mod. Phys. 61(3), 689–746 (1989).
    [CrossRef]
  36. G. Wyszecki and W. S. Stiles, Color Science: Concepts and Methods, Quantatative Data and Formulae, 2nd ed. (John Wiley & Sons, Inc., 1982).

2011 (4)

M. Krings, G. Montana, R. Dronskowski, and C. Wickleder, “α-SrNCN:Eu2+ - A Novel Efficient Orange-Emitting Phosphor,” Chem. Mater. 23(7), 1694–1699 (2011).
[CrossRef]

V. P. Dotsenko, S. M. Levshov, I. V. Berezovskaya, G. B. Stryganyuk, A. S. Voloshinovskii, and N. P. Efryushina, “Luminescent properties of Eu2+ and Ce3+ ions in strontium litho-silicate Li2SrSiO4,” J. Lumin. 131(2), 310–315 (2011).
[CrossRef]

R. Ye, G. Jia, D. Deng, Y. Hua, Z. Cui, S. Zhao, L. Huang, H. Wang, C. Li, and S. Xu, “Controllable Synthesis and Tunable Colors of α- and β-Zn2SiO4:Mn2+ Nanocrystals for UV and Blue Chip Excited White LEDs,” J. Phys. Chem. C 115(21), 10851–10858 (2011).
[CrossRef]

G. Li, D. Deng, X. Su, Q. Wang, Y. Li, Y. Hua, L. Huang, S. Zhao, H. Wang, C. Li, and S. Xu, “Sol-gel synthesis of yellow-emitting La4Ca(SiO4)3O:Ce3+ phosphors for white-light emitting diodes,” Mater. Lett. 65(13), 2019–2021 (2011).
[CrossRef]

2010 (1)

T. Suehiro, H. Onuma, N. Hirosaki, R.-J. Xie, T. Sato, and A. Miyamoto, “Powder Synthesis of Y-α-SiAlON and Its Potential as a Phosphor Host,” J. Phys. Chem. C 114(2), 1337–1342 (2010).
[CrossRef]

2009 (3)

W. B. Im, Y. Fourré, S. Brinkley, J. Sonoda, S. Nakamura, S. P. DenBaars, and R. Seshadri, “Substitution of oxygen by fluorine in the GdSr2AlO5:Ce3+ phosphors: Gd1-xSr2+xAlO5-xFx solid solutions for solid state white lighting,” Opt. Express 17(25), 22673–22679 (2009).
[CrossRef] [PubMed]

H. S. Jang, B.-H. Kwon, H. Yang, and D. Y. Jeon, “Bright three-band white light generated from CdSe/ZnSe quantum dot-assisted Sr3SiO5:Ce3+, Li+-based white light-emitting diode with high color rendering index,” Appl. Phys. Lett. 95(16), 161901 (2009).
[CrossRef]

H. S. Jang, Y.-H. Won, S. Vaidyanathan, D. H. Kim, and D. Y. Jeon, “Emission band change of (Sr1-xMx)3SiO5:Eu2+ (M=Ca, Ba) Phosphor for White Light Sources Using Blue/Near-Ultraviolet LEDs,” J. Electrochem. Soc. 156(6), J138–J142 (2009).
[CrossRef]

2008 (4)

Y. Q. Li, N. Hirosaki, R.-J. Xie, T. Takeda, and M. Mitomo, “Yellow-Orange-Emitting CaAlSiN3:Ce3+ Phosphor: Sturcture, Photolumienscence, and Application in White LEDs,” Chem. Mater. 20(21), 6704–6714 (2008).
[CrossRef]

J. Ziegler, S. Xu, E. Kucur, F. Meister, M. Batentschuk, F. Gindele, and T. Nann, “Silica-Coated InP/ZnS Nanocrystals as Converter Material in White LEDs,” Adv. Mater. (Deerfield Beach Fla.) 20(21), 4068–4073 (2008).
[CrossRef]

H. He, R. Fu, H. Wang, X. Song, Z. Pan, X. Zhao, X. Zhang, and Y. Cao, “Li2SrSiO4:Eu2+ phosphor prepared by the Pechini method and its application in white light emitting diode,” J. Mater. Res. 23(12), 3288–3294 (2008).
[CrossRef]

H. S. Jang, H. Yang, S. W. Kim, J. Y. Han, S.-G. Lee, and D. Y. Jeon, “White Light-Emitting Diodes with Excellent Color Rendering Based on Organically Capped CdSe Quantum Dots and Sr3SiO5:Ce3+,Li+ Phosphors,” Adv. Mater. (Deerfield Beach Fla.) 20(14), 2696–2702 (2008).
[CrossRef]

2007 (5)

H. S. Jang and D. Y. Jeon, “Yellow-emitting Sr3SiO5:Ce3+,Li+ phosphor for white-light-emitting diodes and yellow-light-emitting diodes,” Appl. Phys. Lett. 90(4), 041906 (2007).
[CrossRef]

R.-J. Xie, N. Hirosaki, N. Kimura, K. Sakuma, and M. Mitomo, “2-phosphor-converted white light-emitting diodes using oxynitride/nitride phosphors,” Appl. Phys. Lett. 90(19), 191101 (2007).
[CrossRef]

H. S. Jang and D. Y. Jeon, “White light emission from blue and near ultraviolet light-emitting diodes precoated with a Sr3SiO5:Ce3+,Li+ phosphor,” Opt. Lett. 32(23), 3444–3446 (2007).
[CrossRef] [PubMed]

A. A. Setlur and A. M. Srivastava, “On the relationship between emission color and Ce3+ concentration in garnet phosphors,” Opt. Mater. 29(12), 1647–1652 (2007).
[CrossRef]

H. S. Jang, W. B. Im, D. C. Lee, D. Y. Jeon, and S. S. Kim, “Enhancement of red spectral emission intensity of Y3Al5O12:Ce3+ phosphor via Pr co-doping and Tb substitution for the application to white LEDs,” J. Lumin. 126(2), 371–377 (2007).
[CrossRef]

2006 (2)

M. P. Saradhi and U. V. Varadaraju, “Photoluminescence Studies on Eu2+-Activated Li2SrSiO4 - a Potential Orange-Yellow Phosphor for Solid-State Lighting,” Chem. Mater. 18(22), 5267–5272 (2006).
[CrossRef]

Y.-H. Won, H. S. Jang, W. B. Im, D. Y. Jeon, and J. S. Lee, “Tunable full-color-emitting La0.827Al11.9O19.09:Eu2+,Mn2+ phosphor for application to warm white-light-emitting diodes,” Appl. Phys. Lett. 89(23), 231909 (2006).
[CrossRef]

2005 (2)

E. F. Schubert and J. K. Kim, “Solid-State Light Sources Getting Smart,” Science 308(5726), 1274–1278 (2005).
[CrossRef] [PubMed]

N. Hirosaki, R.-J. Xie, K. Kimoto, T. Sekiguchi, Y. Yamamoto, T. Suehiro, and M. Mitomo, “Characterization and properties of green-emitting β-SiAlON:Eu2+ powder phosphors for white light-emitting diodes,” Appl. Phys. Lett. 86(21), 211905 (2005).
[CrossRef]

2004 (1)

J. K. Park, C. H. Kim, S. H. Park, H. D. Park, and S. Y. Choi, “Application of strontium silicate yellow phosphor for white light-emitting diodes,” Appl. Phys. Lett. 84(10), 1647–1649 (2004).
[CrossRef]

2003 (1)

J. K. Park, M. A. Lim, C. H. Kim, H. D. Park, J. T. Park, and S. Y. Choi, “White light-emitting diodes of GaN-based Sr2SiO4:Eu and the luminescent properties,” Appl. Phys. Lett. 82(5), 683–685 (2003).
[CrossRef]

1999 (1)

B. Hammer, L. B. Hansen, and J. K. Nørskov, “Improved adsorption energetics within density-functional theory using revised Perdew–Burke–Ernzerhof functionals,” Phys. Rev. B 59(11), 7413–7421 (1999).
[CrossRef]

1996 (1)

G. Kresse and J. Furthmüller, “Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set,” Phys. Rev. B Condens. Matter 54(16), 11169–11186 (1996).
[CrossRef] [PubMed]

1994 (1)

G. Kresse and J. Hafner, “Ab initio molecular-dynamics simulation of the liquid-metal-amorphous-semiconductor transition in germanium,” Phys. Rev. B Condens. Matter 49(20), 14251–14269 (1994).
[CrossRef] [PubMed]

1989 (1)

R. O. Jones and O. Gunnarsson, “The density functional formalism, its applications and prospects,” Rev. Mod. Phys. 61(3), 689–746 (1989).
[CrossRef]

1986 (1)

1985 (1)

J. Barbier and B. G. Hyde, “The Structures of the Polymorphs of Dicalcium Silicate, Ca2SiO4,” Acta Crystallogr. B 41(6), 383–390 (1985).
[CrossRef]

1978 (1)

R. R. Jacobs, W. F. Krupke, and M. J. Weber, “Measurement of excited-state-absorption loss for Ce3+ in Y3Al5O12 and implications for tunable 5d→4f rare-earth lasers,” Appl. Phys. Lett. 33(5), 410–412 (1978).
[CrossRef]

1976 (1)

P. V. Kelsey and J. J. Brown., “Ce3+-Activated Photoluminescence in the BaO-SrO-SiO2 system,” J. Electrochem. Soc. 123(9), 1384–1388 (1976).
[CrossRef]

1971 (1)

R. Czaya, “Refinement of the structure of γ-Ca2SiO4,” Acta Crystallogr. 27(4), 848–849 (1971).
[CrossRef]

Barbier, J.

J. Barbier and B. G. Hyde, “The Structures of the Polymorphs of Dicalcium Silicate, Ca2SiO4,” Acta Crystallogr. B 41(6), 383–390 (1985).
[CrossRef]

Batentschuk, M.

J. Ziegler, S. Xu, E. Kucur, F. Meister, M. Batentschuk, F. Gindele, and T. Nann, “Silica-Coated InP/ZnS Nanocrystals as Converter Material in White LEDs,” Adv. Mater. (Deerfield Beach Fla.) 20(21), 4068–4073 (2008).
[CrossRef]

Berezovskaya, I. V.

V. P. Dotsenko, S. M. Levshov, I. V. Berezovskaya, G. B. Stryganyuk, A. S. Voloshinovskii, and N. P. Efryushina, “Luminescent properties of Eu2+ and Ce3+ ions in strontium litho-silicate Li2SrSiO4,” J. Lumin. 131(2), 310–315 (2011).
[CrossRef]

Brinkley, S.

Brown, J. J.

P. V. Kelsey and J. J. Brown., “Ce3+-Activated Photoluminescence in the BaO-SrO-SiO2 system,” J. Electrochem. Soc. 123(9), 1384–1388 (1976).
[CrossRef]

Cao, Y.

H. He, R. Fu, H. Wang, X. Song, Z. Pan, X. Zhao, X. Zhang, and Y. Cao, “Li2SrSiO4:Eu2+ phosphor prepared by the Pechini method and its application in white light emitting diode,” J. Mater. Res. 23(12), 3288–3294 (2008).
[CrossRef]

Choi, S. Y.

J. K. Park, C. H. Kim, S. H. Park, H. D. Park, and S. Y. Choi, “Application of strontium silicate yellow phosphor for white light-emitting diodes,” Appl. Phys. Lett. 84(10), 1647–1649 (2004).
[CrossRef]

J. K. Park, M. A. Lim, C. H. Kim, H. D. Park, J. T. Park, and S. Y. Choi, “White light-emitting diodes of GaN-based Sr2SiO4:Eu and the luminescent properties,” Appl. Phys. Lett. 82(5), 683–685 (2003).
[CrossRef]

Cui, Z.

R. Ye, G. Jia, D. Deng, Y. Hua, Z. Cui, S. Zhao, L. Huang, H. Wang, C. Li, and S. Xu, “Controllable Synthesis and Tunable Colors of α- and β-Zn2SiO4:Mn2+ Nanocrystals for UV and Blue Chip Excited White LEDs,” J. Phys. Chem. C 115(21), 10851–10858 (2011).
[CrossRef]

Czaya, R.

R. Czaya, “Refinement of the structure of γ-Ca2SiO4,” Acta Crystallogr. 27(4), 848–849 (1971).
[CrossRef]

DenBaars, S. P.

Deng, D.

R. Ye, G. Jia, D. Deng, Y. Hua, Z. Cui, S. Zhao, L. Huang, H. Wang, C. Li, and S. Xu, “Controllable Synthesis and Tunable Colors of α- and β-Zn2SiO4:Mn2+ Nanocrystals for UV and Blue Chip Excited White LEDs,” J. Phys. Chem. C 115(21), 10851–10858 (2011).
[CrossRef]

G. Li, D. Deng, X. Su, Q. Wang, Y. Li, Y. Hua, L. Huang, S. Zhao, H. Wang, C. Li, and S. Xu, “Sol-gel synthesis of yellow-emitting La4Ca(SiO4)3O:Ce3+ phosphors for white-light emitting diodes,” Mater. Lett. 65(13), 2019–2021 (2011).
[CrossRef]

Dotsenko, V. P.

V. P. Dotsenko, S. M. Levshov, I. V. Berezovskaya, G. B. Stryganyuk, A. S. Voloshinovskii, and N. P. Efryushina, “Luminescent properties of Eu2+ and Ce3+ ions in strontium litho-silicate Li2SrSiO4,” J. Lumin. 131(2), 310–315 (2011).
[CrossRef]

Dronskowski, R.

M. Krings, G. Montana, R. Dronskowski, and C. Wickleder, “α-SrNCN:Eu2+ - A Novel Efficient Orange-Emitting Phosphor,” Chem. Mater. 23(7), 1694–1699 (2011).
[CrossRef]

Efryushina, N. P.

V. P. Dotsenko, S. M. Levshov, I. V. Berezovskaya, G. B. Stryganyuk, A. S. Voloshinovskii, and N. P. Efryushina, “Luminescent properties of Eu2+ and Ce3+ ions in strontium litho-silicate Li2SrSiO4,” J. Lumin. 131(2), 310–315 (2011).
[CrossRef]

Fourré, Y.

Fu, R.

H. He, R. Fu, H. Wang, X. Song, Z. Pan, X. Zhao, X. Zhang, and Y. Cao, “Li2SrSiO4:Eu2+ phosphor prepared by the Pechini method and its application in white light emitting diode,” J. Mater. Res. 23(12), 3288–3294 (2008).
[CrossRef]

Furthmüller, J.

G. Kresse and J. Furthmüller, “Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set,” Phys. Rev. B Condens. Matter 54(16), 11169–11186 (1996).
[CrossRef] [PubMed]

Gindele, F.

J. Ziegler, S. Xu, E. Kucur, F. Meister, M. Batentschuk, F. Gindele, and T. Nann, “Silica-Coated InP/ZnS Nanocrystals as Converter Material in White LEDs,” Adv. Mater. (Deerfield Beach Fla.) 20(21), 4068–4073 (2008).
[CrossRef]

Gunnarsson, O.

R. O. Jones and O. Gunnarsson, “The density functional formalism, its applications and prospects,” Rev. Mod. Phys. 61(3), 689–746 (1989).
[CrossRef]

Hafner, J.

G. Kresse and J. Hafner, “Ab initio molecular-dynamics simulation of the liquid-metal-amorphous-semiconductor transition in germanium,” Phys. Rev. B Condens. Matter 49(20), 14251–14269 (1994).
[CrossRef] [PubMed]

Hammer, B.

B. Hammer, L. B. Hansen, and J. K. Nørskov, “Improved adsorption energetics within density-functional theory using revised Perdew–Burke–Ernzerhof functionals,” Phys. Rev. B 59(11), 7413–7421 (1999).
[CrossRef]

Han, J. Y.

H. S. Jang, H. Yang, S. W. Kim, J. Y. Han, S.-G. Lee, and D. Y. Jeon, “White Light-Emitting Diodes with Excellent Color Rendering Based on Organically Capped CdSe Quantum Dots and Sr3SiO5:Ce3+,Li+ Phosphors,” Adv. Mater. (Deerfield Beach Fla.) 20(14), 2696–2702 (2008).
[CrossRef]

Handke, M.

Hansen, L. B.

B. Hammer, L. B. Hansen, and J. K. Nørskov, “Improved adsorption energetics within density-functional theory using revised Perdew–Burke–Ernzerhof functionals,” Phys. Rev. B 59(11), 7413–7421 (1999).
[CrossRef]

He, H.

H. He, R. Fu, H. Wang, X. Song, Z. Pan, X. Zhao, X. Zhang, and Y. Cao, “Li2SrSiO4:Eu2+ phosphor prepared by the Pechini method and its application in white light emitting diode,” J. Mater. Res. 23(12), 3288–3294 (2008).
[CrossRef]

Hirosaki, N.

T. Suehiro, H. Onuma, N. Hirosaki, R.-J. Xie, T. Sato, and A. Miyamoto, “Powder Synthesis of Y-α-SiAlON and Its Potential as a Phosphor Host,” J. Phys. Chem. C 114(2), 1337–1342 (2010).
[CrossRef]

Y. Q. Li, N. Hirosaki, R.-J. Xie, T. Takeda, and M. Mitomo, “Yellow-Orange-Emitting CaAlSiN3:Ce3+ Phosphor: Sturcture, Photolumienscence, and Application in White LEDs,” Chem. Mater. 20(21), 6704–6714 (2008).
[CrossRef]

R.-J. Xie, N. Hirosaki, N. Kimura, K. Sakuma, and M. Mitomo, “2-phosphor-converted white light-emitting diodes using oxynitride/nitride phosphors,” Appl. Phys. Lett. 90(19), 191101 (2007).
[CrossRef]

N. Hirosaki, R.-J. Xie, K. Kimoto, T. Sekiguchi, Y. Yamamoto, T. Suehiro, and M. Mitomo, “Characterization and properties of green-emitting β-SiAlON:Eu2+ powder phosphors for white light-emitting diodes,” Appl. Phys. Lett. 86(21), 211905 (2005).
[CrossRef]

Hua, Y.

G. Li, D. Deng, X. Su, Q. Wang, Y. Li, Y. Hua, L. Huang, S. Zhao, H. Wang, C. Li, and S. Xu, “Sol-gel synthesis of yellow-emitting La4Ca(SiO4)3O:Ce3+ phosphors for white-light emitting diodes,” Mater. Lett. 65(13), 2019–2021 (2011).
[CrossRef]

R. Ye, G. Jia, D. Deng, Y. Hua, Z. Cui, S. Zhao, L. Huang, H. Wang, C. Li, and S. Xu, “Controllable Synthesis and Tunable Colors of α- and β-Zn2SiO4:Mn2+ Nanocrystals for UV and Blue Chip Excited White LEDs,” J. Phys. Chem. C 115(21), 10851–10858 (2011).
[CrossRef]

Huang, L.

R. Ye, G. Jia, D. Deng, Y. Hua, Z. Cui, S. Zhao, L. Huang, H. Wang, C. Li, and S. Xu, “Controllable Synthesis and Tunable Colors of α- and β-Zn2SiO4:Mn2+ Nanocrystals for UV and Blue Chip Excited White LEDs,” J. Phys. Chem. C 115(21), 10851–10858 (2011).
[CrossRef]

G. Li, D. Deng, X. Su, Q. Wang, Y. Li, Y. Hua, L. Huang, S. Zhao, H. Wang, C. Li, and S. Xu, “Sol-gel synthesis of yellow-emitting La4Ca(SiO4)3O:Ce3+ phosphors for white-light emitting diodes,” Mater. Lett. 65(13), 2019–2021 (2011).
[CrossRef]

Hyde, B. G.

J. Barbier and B. G. Hyde, “The Structures of the Polymorphs of Dicalcium Silicate, Ca2SiO4,” Acta Crystallogr. B 41(6), 383–390 (1985).
[CrossRef]

Im, W. B.

W. B. Im, Y. Fourré, S. Brinkley, J. Sonoda, S. Nakamura, S. P. DenBaars, and R. Seshadri, “Substitution of oxygen by fluorine in the GdSr2AlO5:Ce3+ phosphors: Gd1-xSr2+xAlO5-xFx solid solutions for solid state white lighting,” Opt. Express 17(25), 22673–22679 (2009).
[CrossRef] [PubMed]

H. S. Jang, W. B. Im, D. C. Lee, D. Y. Jeon, and S. S. Kim, “Enhancement of red spectral emission intensity of Y3Al5O12:Ce3+ phosphor via Pr co-doping and Tb substitution for the application to white LEDs,” J. Lumin. 126(2), 371–377 (2007).
[CrossRef]

Y.-H. Won, H. S. Jang, W. B. Im, D. Y. Jeon, and J. S. Lee, “Tunable full-color-emitting La0.827Al11.9O19.09:Eu2+,Mn2+ phosphor for application to warm white-light-emitting diodes,” Appl. Phys. Lett. 89(23), 231909 (2006).
[CrossRef]

Jacobs, R. R.

R. R. Jacobs, W. F. Krupke, and M. J. Weber, “Measurement of excited-state-absorption loss for Ce3+ in Y3Al5O12 and implications for tunable 5d→4f rare-earth lasers,” Appl. Phys. Lett. 33(5), 410–412 (1978).
[CrossRef]

Jang, H. S.

H. S. Jang, Y.-H. Won, S. Vaidyanathan, D. H. Kim, and D. Y. Jeon, “Emission band change of (Sr1-xMx)3SiO5:Eu2+ (M=Ca, Ba) Phosphor for White Light Sources Using Blue/Near-Ultraviolet LEDs,” J. Electrochem. Soc. 156(6), J138–J142 (2009).
[CrossRef]

H. S. Jang, B.-H. Kwon, H. Yang, and D. Y. Jeon, “Bright three-band white light generated from CdSe/ZnSe quantum dot-assisted Sr3SiO5:Ce3+, Li+-based white light-emitting diode with high color rendering index,” Appl. Phys. Lett. 95(16), 161901 (2009).
[CrossRef]

H. S. Jang, H. Yang, S. W. Kim, J. Y. Han, S.-G. Lee, and D. Y. Jeon, “White Light-Emitting Diodes with Excellent Color Rendering Based on Organically Capped CdSe Quantum Dots and Sr3SiO5:Ce3+,Li+ Phosphors,” Adv. Mater. (Deerfield Beach Fla.) 20(14), 2696–2702 (2008).
[CrossRef]

H. S. Jang and D. Y. Jeon, “Yellow-emitting Sr3SiO5:Ce3+,Li+ phosphor for white-light-emitting diodes and yellow-light-emitting diodes,” Appl. Phys. Lett. 90(4), 041906 (2007).
[CrossRef]

H. S. Jang and D. Y. Jeon, “White light emission from blue and near ultraviolet light-emitting diodes precoated with a Sr3SiO5:Ce3+,Li+ phosphor,” Opt. Lett. 32(23), 3444–3446 (2007).
[CrossRef] [PubMed]

H. S. Jang, W. B. Im, D. C. Lee, D. Y. Jeon, and S. S. Kim, “Enhancement of red spectral emission intensity of Y3Al5O12:Ce3+ phosphor via Pr co-doping and Tb substitution for the application to white LEDs,” J. Lumin. 126(2), 371–377 (2007).
[CrossRef]

Y.-H. Won, H. S. Jang, W. B. Im, D. Y. Jeon, and J. S. Lee, “Tunable full-color-emitting La0.827Al11.9O19.09:Eu2+,Mn2+ phosphor for application to warm white-light-emitting diodes,” Appl. Phys. Lett. 89(23), 231909 (2006).
[CrossRef]

Jeon, D. Y.

H. S. Jang, B.-H. Kwon, H. Yang, and D. Y. Jeon, “Bright three-band white light generated from CdSe/ZnSe quantum dot-assisted Sr3SiO5:Ce3+, Li+-based white light-emitting diode with high color rendering index,” Appl. Phys. Lett. 95(16), 161901 (2009).
[CrossRef]

H. S. Jang, Y.-H. Won, S. Vaidyanathan, D. H. Kim, and D. Y. Jeon, “Emission band change of (Sr1-xMx)3SiO5:Eu2+ (M=Ca, Ba) Phosphor for White Light Sources Using Blue/Near-Ultraviolet LEDs,” J. Electrochem. Soc. 156(6), J138–J142 (2009).
[CrossRef]

H. S. Jang, H. Yang, S. W. Kim, J. Y. Han, S.-G. Lee, and D. Y. Jeon, “White Light-Emitting Diodes with Excellent Color Rendering Based on Organically Capped CdSe Quantum Dots and Sr3SiO5:Ce3+,Li+ Phosphors,” Adv. Mater. (Deerfield Beach Fla.) 20(14), 2696–2702 (2008).
[CrossRef]

H. S. Jang and D. Y. Jeon, “Yellow-emitting Sr3SiO5:Ce3+,Li+ phosphor for white-light-emitting diodes and yellow-light-emitting diodes,” Appl. Phys. Lett. 90(4), 041906 (2007).
[CrossRef]

H. S. Jang and D. Y. Jeon, “White light emission from blue and near ultraviolet light-emitting diodes precoated with a Sr3SiO5:Ce3+,Li+ phosphor,” Opt. Lett. 32(23), 3444–3446 (2007).
[CrossRef] [PubMed]

H. S. Jang, W. B. Im, D. C. Lee, D. Y. Jeon, and S. S. Kim, “Enhancement of red spectral emission intensity of Y3Al5O12:Ce3+ phosphor via Pr co-doping and Tb substitution for the application to white LEDs,” J. Lumin. 126(2), 371–377 (2007).
[CrossRef]

Y.-H. Won, H. S. Jang, W. B. Im, D. Y. Jeon, and J. S. Lee, “Tunable full-color-emitting La0.827Al11.9O19.09:Eu2+,Mn2+ phosphor for application to warm white-light-emitting diodes,” Appl. Phys. Lett. 89(23), 231909 (2006).
[CrossRef]

Jia, G.

R. Ye, G. Jia, D. Deng, Y. Hua, Z. Cui, S. Zhao, L. Huang, H. Wang, C. Li, and S. Xu, “Controllable Synthesis and Tunable Colors of α- and β-Zn2SiO4:Mn2+ Nanocrystals for UV and Blue Chip Excited White LEDs,” J. Phys. Chem. C 115(21), 10851–10858 (2011).
[CrossRef]

Jones, R. O.

R. O. Jones and O. Gunnarsson, “The density functional formalism, its applications and prospects,” Rev. Mod. Phys. 61(3), 689–746 (1989).
[CrossRef]

Kelsey, P. V.

P. V. Kelsey and J. J. Brown., “Ce3+-Activated Photoluminescence in the BaO-SrO-SiO2 system,” J. Electrochem. Soc. 123(9), 1384–1388 (1976).
[CrossRef]

Kim, C. H.

J. K. Park, C. H. Kim, S. H. Park, H. D. Park, and S. Y. Choi, “Application of strontium silicate yellow phosphor for white light-emitting diodes,” Appl. Phys. Lett. 84(10), 1647–1649 (2004).
[CrossRef]

J. K. Park, M. A. Lim, C. H. Kim, H. D. Park, J. T. Park, and S. Y. Choi, “White light-emitting diodes of GaN-based Sr2SiO4:Eu and the luminescent properties,” Appl. Phys. Lett. 82(5), 683–685 (2003).
[CrossRef]

Kim, D. H.

H. S. Jang, Y.-H. Won, S. Vaidyanathan, D. H. Kim, and D. Y. Jeon, “Emission band change of (Sr1-xMx)3SiO5:Eu2+ (M=Ca, Ba) Phosphor for White Light Sources Using Blue/Near-Ultraviolet LEDs,” J. Electrochem. Soc. 156(6), J138–J142 (2009).
[CrossRef]

Kim, J. K.

E. F. Schubert and J. K. Kim, “Solid-State Light Sources Getting Smart,” Science 308(5726), 1274–1278 (2005).
[CrossRef] [PubMed]

Kim, S. S.

H. S. Jang, W. B. Im, D. C. Lee, D. Y. Jeon, and S. S. Kim, “Enhancement of red spectral emission intensity of Y3Al5O12:Ce3+ phosphor via Pr co-doping and Tb substitution for the application to white LEDs,” J. Lumin. 126(2), 371–377 (2007).
[CrossRef]

Kim, S. W.

H. S. Jang, H. Yang, S. W. Kim, J. Y. Han, S.-G. Lee, and D. Y. Jeon, “White Light-Emitting Diodes with Excellent Color Rendering Based on Organically Capped CdSe Quantum Dots and Sr3SiO5:Ce3+,Li+ Phosphors,” Adv. Mater. (Deerfield Beach Fla.) 20(14), 2696–2702 (2008).
[CrossRef]

Kimoto, K.

N. Hirosaki, R.-J. Xie, K. Kimoto, T. Sekiguchi, Y. Yamamoto, T. Suehiro, and M. Mitomo, “Characterization and properties of green-emitting β-SiAlON:Eu2+ powder phosphors for white light-emitting diodes,” Appl. Phys. Lett. 86(21), 211905 (2005).
[CrossRef]

Kimura, N.

R.-J. Xie, N. Hirosaki, N. Kimura, K. Sakuma, and M. Mitomo, “2-phosphor-converted white light-emitting diodes using oxynitride/nitride phosphors,” Appl. Phys. Lett. 90(19), 191101 (2007).
[CrossRef]

Kresse, G.

G. Kresse and J. Furthmüller, “Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set,” Phys. Rev. B Condens. Matter 54(16), 11169–11186 (1996).
[CrossRef] [PubMed]

G. Kresse and J. Hafner, “Ab initio molecular-dynamics simulation of the liquid-metal-amorphous-semiconductor transition in germanium,” Phys. Rev. B Condens. Matter 49(20), 14251–14269 (1994).
[CrossRef] [PubMed]

Krings, M.

M. Krings, G. Montana, R. Dronskowski, and C. Wickleder, “α-SrNCN:Eu2+ - A Novel Efficient Orange-Emitting Phosphor,” Chem. Mater. 23(7), 1694–1699 (2011).
[CrossRef]

Krupke, W. F.

R. R. Jacobs, W. F. Krupke, and M. J. Weber, “Measurement of excited-state-absorption loss for Ce3+ in Y3Al5O12 and implications for tunable 5d→4f rare-earth lasers,” Appl. Phys. Lett. 33(5), 410–412 (1978).
[CrossRef]

Kucur, E.

J. Ziegler, S. Xu, E. Kucur, F. Meister, M. Batentschuk, F. Gindele, and T. Nann, “Silica-Coated InP/ZnS Nanocrystals as Converter Material in White LEDs,” Adv. Mater. (Deerfield Beach Fla.) 20(21), 4068–4073 (2008).
[CrossRef]

Kwon, B.-H.

H. S. Jang, B.-H. Kwon, H. Yang, and D. Y. Jeon, “Bright three-band white light generated from CdSe/ZnSe quantum dot-assisted Sr3SiO5:Ce3+, Li+-based white light-emitting diode with high color rendering index,” Appl. Phys. Lett. 95(16), 161901 (2009).
[CrossRef]

Lee, D. C.

H. S. Jang, W. B. Im, D. C. Lee, D. Y. Jeon, and S. S. Kim, “Enhancement of red spectral emission intensity of Y3Al5O12:Ce3+ phosphor via Pr co-doping and Tb substitution for the application to white LEDs,” J. Lumin. 126(2), 371–377 (2007).
[CrossRef]

Lee, J. S.

Y.-H. Won, H. S. Jang, W. B. Im, D. Y. Jeon, and J. S. Lee, “Tunable full-color-emitting La0.827Al11.9O19.09:Eu2+,Mn2+ phosphor for application to warm white-light-emitting diodes,” Appl. Phys. Lett. 89(23), 231909 (2006).
[CrossRef]

Lee, S.-G.

H. S. Jang, H. Yang, S. W. Kim, J. Y. Han, S.-G. Lee, and D. Y. Jeon, “White Light-Emitting Diodes with Excellent Color Rendering Based on Organically Capped CdSe Quantum Dots and Sr3SiO5:Ce3+,Li+ Phosphors,” Adv. Mater. (Deerfield Beach Fla.) 20(14), 2696–2702 (2008).
[CrossRef]

Levshov, S. M.

V. P. Dotsenko, S. M. Levshov, I. V. Berezovskaya, G. B. Stryganyuk, A. S. Voloshinovskii, and N. P. Efryushina, “Luminescent properties of Eu2+ and Ce3+ ions in strontium litho-silicate Li2SrSiO4,” J. Lumin. 131(2), 310–315 (2011).
[CrossRef]

Li, C.

G. Li, D. Deng, X. Su, Q. Wang, Y. Li, Y. Hua, L. Huang, S. Zhao, H. Wang, C. Li, and S. Xu, “Sol-gel synthesis of yellow-emitting La4Ca(SiO4)3O:Ce3+ phosphors for white-light emitting diodes,” Mater. Lett. 65(13), 2019–2021 (2011).
[CrossRef]

R. Ye, G. Jia, D. Deng, Y. Hua, Z. Cui, S. Zhao, L. Huang, H. Wang, C. Li, and S. Xu, “Controllable Synthesis and Tunable Colors of α- and β-Zn2SiO4:Mn2+ Nanocrystals for UV and Blue Chip Excited White LEDs,” J. Phys. Chem. C 115(21), 10851–10858 (2011).
[CrossRef]

Li, G.

G. Li, D. Deng, X. Su, Q. Wang, Y. Li, Y. Hua, L. Huang, S. Zhao, H. Wang, C. Li, and S. Xu, “Sol-gel synthesis of yellow-emitting La4Ca(SiO4)3O:Ce3+ phosphors for white-light emitting diodes,” Mater. Lett. 65(13), 2019–2021 (2011).
[CrossRef]

Li, Y.

G. Li, D. Deng, X. Su, Q. Wang, Y. Li, Y. Hua, L. Huang, S. Zhao, H. Wang, C. Li, and S. Xu, “Sol-gel synthesis of yellow-emitting La4Ca(SiO4)3O:Ce3+ phosphors for white-light emitting diodes,” Mater. Lett. 65(13), 2019–2021 (2011).
[CrossRef]

Li, Y. Q.

Y. Q. Li, N. Hirosaki, R.-J. Xie, T. Takeda, and M. Mitomo, “Yellow-Orange-Emitting CaAlSiN3:Ce3+ Phosphor: Sturcture, Photolumienscence, and Application in White LEDs,” Chem. Mater. 20(21), 6704–6714 (2008).
[CrossRef]

Lim, M. A.

J. K. Park, M. A. Lim, C. H. Kim, H. D. Park, J. T. Park, and S. Y. Choi, “White light-emitting diodes of GaN-based Sr2SiO4:Eu and the luminescent properties,” Appl. Phys. Lett. 82(5), 683–685 (2003).
[CrossRef]

Meister, F.

J. Ziegler, S. Xu, E. Kucur, F. Meister, M. Batentschuk, F. Gindele, and T. Nann, “Silica-Coated InP/ZnS Nanocrystals as Converter Material in White LEDs,” Adv. Mater. (Deerfield Beach Fla.) 20(21), 4068–4073 (2008).
[CrossRef]

Mitomo, M.

Y. Q. Li, N. Hirosaki, R.-J. Xie, T. Takeda, and M. Mitomo, “Yellow-Orange-Emitting CaAlSiN3:Ce3+ Phosphor: Sturcture, Photolumienscence, and Application in White LEDs,” Chem. Mater. 20(21), 6704–6714 (2008).
[CrossRef]

R.-J. Xie, N. Hirosaki, N. Kimura, K. Sakuma, and M. Mitomo, “2-phosphor-converted white light-emitting diodes using oxynitride/nitride phosphors,” Appl. Phys. Lett. 90(19), 191101 (2007).
[CrossRef]

N. Hirosaki, R.-J. Xie, K. Kimoto, T. Sekiguchi, Y. Yamamoto, T. Suehiro, and M. Mitomo, “Characterization and properties of green-emitting β-SiAlON:Eu2+ powder phosphors for white light-emitting diodes,” Appl. Phys. Lett. 86(21), 211905 (2005).
[CrossRef]

Miyamoto, A.

T. Suehiro, H. Onuma, N. Hirosaki, R.-J. Xie, T. Sato, and A. Miyamoto, “Powder Synthesis of Y-α-SiAlON and Its Potential as a Phosphor Host,” J. Phys. Chem. C 114(2), 1337–1342 (2010).
[CrossRef]

Montana, G.

M. Krings, G. Montana, R. Dronskowski, and C. Wickleder, “α-SrNCN:Eu2+ - A Novel Efficient Orange-Emitting Phosphor,” Chem. Mater. 23(7), 1694–1699 (2011).
[CrossRef]

Nakamura, S.

Nann, T.

J. Ziegler, S. Xu, E. Kucur, F. Meister, M. Batentschuk, F. Gindele, and T. Nann, “Silica-Coated InP/ZnS Nanocrystals as Converter Material in White LEDs,” Adv. Mater. (Deerfield Beach Fla.) 20(21), 4068–4073 (2008).
[CrossRef]

Nørskov, J. K.

B. Hammer, L. B. Hansen, and J. K. Nørskov, “Improved adsorption energetics within density-functional theory using revised Perdew–Burke–Ernzerhof functionals,” Phys. Rev. B 59(11), 7413–7421 (1999).
[CrossRef]

Onuma, H.

T. Suehiro, H. Onuma, N. Hirosaki, R.-J. Xie, T. Sato, and A. Miyamoto, “Powder Synthesis of Y-α-SiAlON and Its Potential as a Phosphor Host,” J. Phys. Chem. C 114(2), 1337–1342 (2010).
[CrossRef]

Pan, Z.

H. He, R. Fu, H. Wang, X. Song, Z. Pan, X. Zhao, X. Zhang, and Y. Cao, “Li2SrSiO4:Eu2+ phosphor prepared by the Pechini method and its application in white light emitting diode,” J. Mater. Res. 23(12), 3288–3294 (2008).
[CrossRef]

Park, H. D.

J. K. Park, C. H. Kim, S. H. Park, H. D. Park, and S. Y. Choi, “Application of strontium silicate yellow phosphor for white light-emitting diodes,” Appl. Phys. Lett. 84(10), 1647–1649 (2004).
[CrossRef]

J. K. Park, M. A. Lim, C. H. Kim, H. D. Park, J. T. Park, and S. Y. Choi, “White light-emitting diodes of GaN-based Sr2SiO4:Eu and the luminescent properties,” Appl. Phys. Lett. 82(5), 683–685 (2003).
[CrossRef]

Park, J. K.

J. K. Park, C. H. Kim, S. H. Park, H. D. Park, and S. Y. Choi, “Application of strontium silicate yellow phosphor for white light-emitting diodes,” Appl. Phys. Lett. 84(10), 1647–1649 (2004).
[CrossRef]

J. K. Park, M. A. Lim, C. H. Kim, H. D. Park, J. T. Park, and S. Y. Choi, “White light-emitting diodes of GaN-based Sr2SiO4:Eu and the luminescent properties,” Appl. Phys. Lett. 82(5), 683–685 (2003).
[CrossRef]

Park, J. T.

J. K. Park, M. A. Lim, C. H. Kim, H. D. Park, J. T. Park, and S. Y. Choi, “White light-emitting diodes of GaN-based Sr2SiO4:Eu and the luminescent properties,” Appl. Phys. Lett. 82(5), 683–685 (2003).
[CrossRef]

Park, S. H.

J. K. Park, C. H. Kim, S. H. Park, H. D. Park, and S. Y. Choi, “Application of strontium silicate yellow phosphor for white light-emitting diodes,” Appl. Phys. Lett. 84(10), 1647–1649 (2004).
[CrossRef]

Sakuma, K.

R.-J. Xie, N. Hirosaki, N. Kimura, K. Sakuma, and M. Mitomo, “2-phosphor-converted white light-emitting diodes using oxynitride/nitride phosphors,” Appl. Phys. Lett. 90(19), 191101 (2007).
[CrossRef]

Saradhi, M. P.

M. P. Saradhi and U. V. Varadaraju, “Photoluminescence Studies on Eu2+-Activated Li2SrSiO4 - a Potential Orange-Yellow Phosphor for Solid-State Lighting,” Chem. Mater. 18(22), 5267–5272 (2006).
[CrossRef]

Sato, T.

T. Suehiro, H. Onuma, N. Hirosaki, R.-J. Xie, T. Sato, and A. Miyamoto, “Powder Synthesis of Y-α-SiAlON and Its Potential as a Phosphor Host,” J. Phys. Chem. C 114(2), 1337–1342 (2010).
[CrossRef]

Schubert, E. F.

E. F. Schubert and J. K. Kim, “Solid-State Light Sources Getting Smart,” Science 308(5726), 1274–1278 (2005).
[CrossRef] [PubMed]

Sekiguchi, T.

N. Hirosaki, R.-J. Xie, K. Kimoto, T. Sekiguchi, Y. Yamamoto, T. Suehiro, and M. Mitomo, “Characterization and properties of green-emitting β-SiAlON:Eu2+ powder phosphors for white light-emitting diodes,” Appl. Phys. Lett. 86(21), 211905 (2005).
[CrossRef]

Seshadri, R.

Setlur, A. A.

A. A. Setlur and A. M. Srivastava, “On the relationship between emission color and Ce3+ concentration in garnet phosphors,” Opt. Mater. 29(12), 1647–1652 (2007).
[CrossRef]

Song, X.

H. He, R. Fu, H. Wang, X. Song, Z. Pan, X. Zhao, X. Zhang, and Y. Cao, “Li2SrSiO4:Eu2+ phosphor prepared by the Pechini method and its application in white light emitting diode,” J. Mater. Res. 23(12), 3288–3294 (2008).
[CrossRef]

Sonoda, J.

Srivastava, A. M.

A. A. Setlur and A. M. Srivastava, “On the relationship between emission color and Ce3+ concentration in garnet phosphors,” Opt. Mater. 29(12), 1647–1652 (2007).
[CrossRef]

Stryganyuk, G. B.

V. P. Dotsenko, S. M. Levshov, I. V. Berezovskaya, G. B. Stryganyuk, A. S. Voloshinovskii, and N. P. Efryushina, “Luminescent properties of Eu2+ and Ce3+ ions in strontium litho-silicate Li2SrSiO4,” J. Lumin. 131(2), 310–315 (2011).
[CrossRef]

Su, X.

G. Li, D. Deng, X. Su, Q. Wang, Y. Li, Y. Hua, L. Huang, S. Zhao, H. Wang, C. Li, and S. Xu, “Sol-gel synthesis of yellow-emitting La4Ca(SiO4)3O:Ce3+ phosphors for white-light emitting diodes,” Mater. Lett. 65(13), 2019–2021 (2011).
[CrossRef]

Suehiro, T.

T. Suehiro, H. Onuma, N. Hirosaki, R.-J. Xie, T. Sato, and A. Miyamoto, “Powder Synthesis of Y-α-SiAlON and Its Potential as a Phosphor Host,” J. Phys. Chem. C 114(2), 1337–1342 (2010).
[CrossRef]

N. Hirosaki, R.-J. Xie, K. Kimoto, T. Sekiguchi, Y. Yamamoto, T. Suehiro, and M. Mitomo, “Characterization and properties of green-emitting β-SiAlON:Eu2+ powder phosphors for white light-emitting diodes,” Appl. Phys. Lett. 86(21), 211905 (2005).
[CrossRef]

Takeda, T.

Y. Q. Li, N. Hirosaki, R.-J. Xie, T. Takeda, and M. Mitomo, “Yellow-Orange-Emitting CaAlSiN3:Ce3+ Phosphor: Sturcture, Photolumienscence, and Application in White LEDs,” Chem. Mater. 20(21), 6704–6714 (2008).
[CrossRef]

Vaidyanathan, S.

H. S. Jang, Y.-H. Won, S. Vaidyanathan, D. H. Kim, and D. Y. Jeon, “Emission band change of (Sr1-xMx)3SiO5:Eu2+ (M=Ca, Ba) Phosphor for White Light Sources Using Blue/Near-Ultraviolet LEDs,” J. Electrochem. Soc. 156(6), J138–J142 (2009).
[CrossRef]

Varadaraju, U. V.

M. P. Saradhi and U. V. Varadaraju, “Photoluminescence Studies on Eu2+-Activated Li2SrSiO4 - a Potential Orange-Yellow Phosphor for Solid-State Lighting,” Chem. Mater. 18(22), 5267–5272 (2006).
[CrossRef]

Voloshinovskii, A. S.

V. P. Dotsenko, S. M. Levshov, I. V. Berezovskaya, G. B. Stryganyuk, A. S. Voloshinovskii, and N. P. Efryushina, “Luminescent properties of Eu2+ and Ce3+ ions in strontium litho-silicate Li2SrSiO4,” J. Lumin. 131(2), 310–315 (2011).
[CrossRef]

Wang, H.

G. Li, D. Deng, X. Su, Q. Wang, Y. Li, Y. Hua, L. Huang, S. Zhao, H. Wang, C. Li, and S. Xu, “Sol-gel synthesis of yellow-emitting La4Ca(SiO4)3O:Ce3+ phosphors for white-light emitting diodes,” Mater. Lett. 65(13), 2019–2021 (2011).
[CrossRef]

R. Ye, G. Jia, D. Deng, Y. Hua, Z. Cui, S. Zhao, L. Huang, H. Wang, C. Li, and S. Xu, “Controllable Synthesis and Tunable Colors of α- and β-Zn2SiO4:Mn2+ Nanocrystals for UV and Blue Chip Excited White LEDs,” J. Phys. Chem. C 115(21), 10851–10858 (2011).
[CrossRef]

H. He, R. Fu, H. Wang, X. Song, Z. Pan, X. Zhao, X. Zhang, and Y. Cao, “Li2SrSiO4:Eu2+ phosphor prepared by the Pechini method and its application in white light emitting diode,” J. Mater. Res. 23(12), 3288–3294 (2008).
[CrossRef]

Wang, Q.

G. Li, D. Deng, X. Su, Q. Wang, Y. Li, Y. Hua, L. Huang, S. Zhao, H. Wang, C. Li, and S. Xu, “Sol-gel synthesis of yellow-emitting La4Ca(SiO4)3O:Ce3+ phosphors for white-light emitting diodes,” Mater. Lett. 65(13), 2019–2021 (2011).
[CrossRef]

Weber, M. J.

R. R. Jacobs, W. F. Krupke, and M. J. Weber, “Measurement of excited-state-absorption loss for Ce3+ in Y3Al5O12 and implications for tunable 5d→4f rare-earth lasers,” Appl. Phys. Lett. 33(5), 410–412 (1978).
[CrossRef]

Wickleder, C.

M. Krings, G. Montana, R. Dronskowski, and C. Wickleder, “α-SrNCN:Eu2+ - A Novel Efficient Orange-Emitting Phosphor,” Chem. Mater. 23(7), 1694–1699 (2011).
[CrossRef]

Won, Y.-H.

H. S. Jang, Y.-H. Won, S. Vaidyanathan, D. H. Kim, and D. Y. Jeon, “Emission band change of (Sr1-xMx)3SiO5:Eu2+ (M=Ca, Ba) Phosphor for White Light Sources Using Blue/Near-Ultraviolet LEDs,” J. Electrochem. Soc. 156(6), J138–J142 (2009).
[CrossRef]

Y.-H. Won, H. S. Jang, W. B. Im, D. Y. Jeon, and J. S. Lee, “Tunable full-color-emitting La0.827Al11.9O19.09:Eu2+,Mn2+ phosphor for application to warm white-light-emitting diodes,” Appl. Phys. Lett. 89(23), 231909 (2006).
[CrossRef]

Xie, R.-J.

T. Suehiro, H. Onuma, N. Hirosaki, R.-J. Xie, T. Sato, and A. Miyamoto, “Powder Synthesis of Y-α-SiAlON and Its Potential as a Phosphor Host,” J. Phys. Chem. C 114(2), 1337–1342 (2010).
[CrossRef]

Y. Q. Li, N. Hirosaki, R.-J. Xie, T. Takeda, and M. Mitomo, “Yellow-Orange-Emitting CaAlSiN3:Ce3+ Phosphor: Sturcture, Photolumienscence, and Application in White LEDs,” Chem. Mater. 20(21), 6704–6714 (2008).
[CrossRef]

R.-J. Xie, N. Hirosaki, N. Kimura, K. Sakuma, and M. Mitomo, “2-phosphor-converted white light-emitting diodes using oxynitride/nitride phosphors,” Appl. Phys. Lett. 90(19), 191101 (2007).
[CrossRef]

N. Hirosaki, R.-J. Xie, K. Kimoto, T. Sekiguchi, Y. Yamamoto, T. Suehiro, and M. Mitomo, “Characterization and properties of green-emitting β-SiAlON:Eu2+ powder phosphors for white light-emitting diodes,” Appl. Phys. Lett. 86(21), 211905 (2005).
[CrossRef]

Xu, S.

G. Li, D. Deng, X. Su, Q. Wang, Y. Li, Y. Hua, L. Huang, S. Zhao, H. Wang, C. Li, and S. Xu, “Sol-gel synthesis of yellow-emitting La4Ca(SiO4)3O:Ce3+ phosphors for white-light emitting diodes,” Mater. Lett. 65(13), 2019–2021 (2011).
[CrossRef]

R. Ye, G. Jia, D. Deng, Y. Hua, Z. Cui, S. Zhao, L. Huang, H. Wang, C. Li, and S. Xu, “Controllable Synthesis and Tunable Colors of α- and β-Zn2SiO4:Mn2+ Nanocrystals for UV and Blue Chip Excited White LEDs,” J. Phys. Chem. C 115(21), 10851–10858 (2011).
[CrossRef]

J. Ziegler, S. Xu, E. Kucur, F. Meister, M. Batentschuk, F. Gindele, and T. Nann, “Silica-Coated InP/ZnS Nanocrystals as Converter Material in White LEDs,” Adv. Mater. (Deerfield Beach Fla.) 20(21), 4068–4073 (2008).
[CrossRef]

Yamamoto, Y.

N. Hirosaki, R.-J. Xie, K. Kimoto, T. Sekiguchi, Y. Yamamoto, T. Suehiro, and M. Mitomo, “Characterization and properties of green-emitting β-SiAlON:Eu2+ powder phosphors for white light-emitting diodes,” Appl. Phys. Lett. 86(21), 211905 (2005).
[CrossRef]

Yang, H.

H. S. Jang, B.-H. Kwon, H. Yang, and D. Y. Jeon, “Bright three-band white light generated from CdSe/ZnSe quantum dot-assisted Sr3SiO5:Ce3+, Li+-based white light-emitting diode with high color rendering index,” Appl. Phys. Lett. 95(16), 161901 (2009).
[CrossRef]

H. S. Jang, H. Yang, S. W. Kim, J. Y. Han, S.-G. Lee, and D. Y. Jeon, “White Light-Emitting Diodes with Excellent Color Rendering Based on Organically Capped CdSe Quantum Dots and Sr3SiO5:Ce3+,Li+ Phosphors,” Adv. Mater. (Deerfield Beach Fla.) 20(14), 2696–2702 (2008).
[CrossRef]

Ye, R.

R. Ye, G. Jia, D. Deng, Y. Hua, Z. Cui, S. Zhao, L. Huang, H. Wang, C. Li, and S. Xu, “Controllable Synthesis and Tunable Colors of α- and β-Zn2SiO4:Mn2+ Nanocrystals for UV and Blue Chip Excited White LEDs,” J. Phys. Chem. C 115(21), 10851–10858 (2011).
[CrossRef]

Zhang, X.

H. He, R. Fu, H. Wang, X. Song, Z. Pan, X. Zhao, X. Zhang, and Y. Cao, “Li2SrSiO4:Eu2+ phosphor prepared by the Pechini method and its application in white light emitting diode,” J. Mater. Res. 23(12), 3288–3294 (2008).
[CrossRef]

Zhao, S.

R. Ye, G. Jia, D. Deng, Y. Hua, Z. Cui, S. Zhao, L. Huang, H. Wang, C. Li, and S. Xu, “Controllable Synthesis and Tunable Colors of α- and β-Zn2SiO4:Mn2+ Nanocrystals for UV and Blue Chip Excited White LEDs,” J. Phys. Chem. C 115(21), 10851–10858 (2011).
[CrossRef]

G. Li, D. Deng, X. Su, Q. Wang, Y. Li, Y. Hua, L. Huang, S. Zhao, H. Wang, C. Li, and S. Xu, “Sol-gel synthesis of yellow-emitting La4Ca(SiO4)3O:Ce3+ phosphors for white-light emitting diodes,” Mater. Lett. 65(13), 2019–2021 (2011).
[CrossRef]

Zhao, X.

H. He, R. Fu, H. Wang, X. Song, Z. Pan, X. Zhao, X. Zhang, and Y. Cao, “Li2SrSiO4:Eu2+ phosphor prepared by the Pechini method and its application in white light emitting diode,” J. Mater. Res. 23(12), 3288–3294 (2008).
[CrossRef]

Ziegler, J.

J. Ziegler, S. Xu, E. Kucur, F. Meister, M. Batentschuk, F. Gindele, and T. Nann, “Silica-Coated InP/ZnS Nanocrystals as Converter Material in White LEDs,” Adv. Mater. (Deerfield Beach Fla.) 20(21), 4068–4073 (2008).
[CrossRef]

Acta Crystallogr. (1)

R. Czaya, “Refinement of the structure of γ-Ca2SiO4,” Acta Crystallogr. 27(4), 848–849 (1971).
[CrossRef]

Acta Crystallogr. B (1)

J. Barbier and B. G. Hyde, “The Structures of the Polymorphs of Dicalcium Silicate, Ca2SiO4,” Acta Crystallogr. B 41(6), 383–390 (1985).
[CrossRef]

Adv. Mater. (Deerfield Beach Fla.) (2)

H. S. Jang, H. Yang, S. W. Kim, J. Y. Han, S.-G. Lee, and D. Y. Jeon, “White Light-Emitting Diodes with Excellent Color Rendering Based on Organically Capped CdSe Quantum Dots and Sr3SiO5:Ce3+,Li+ Phosphors,” Adv. Mater. (Deerfield Beach Fla.) 20(14), 2696–2702 (2008).
[CrossRef]

J. Ziegler, S. Xu, E. Kucur, F. Meister, M. Batentschuk, F. Gindele, and T. Nann, “Silica-Coated InP/ZnS Nanocrystals as Converter Material in White LEDs,” Adv. Mater. (Deerfield Beach Fla.) 20(21), 4068–4073 (2008).
[CrossRef]

Appl. Phys. Lett. (8)

J. K. Park, C. H. Kim, S. H. Park, H. D. Park, and S. Y. Choi, “Application of strontium silicate yellow phosphor for white light-emitting diodes,” Appl. Phys. Lett. 84(10), 1647–1649 (2004).
[CrossRef]

H. S. Jang, B.-H. Kwon, H. Yang, and D. Y. Jeon, “Bright three-band white light generated from CdSe/ZnSe quantum dot-assisted Sr3SiO5:Ce3+, Li+-based white light-emitting diode with high color rendering index,” Appl. Phys. Lett. 95(16), 161901 (2009).
[CrossRef]

J. K. Park, M. A. Lim, C. H. Kim, H. D. Park, J. T. Park, and S. Y. Choi, “White light-emitting diodes of GaN-based Sr2SiO4:Eu and the luminescent properties,” Appl. Phys. Lett. 82(5), 683–685 (2003).
[CrossRef]

H. S. Jang and D. Y. Jeon, “Yellow-emitting Sr3SiO5:Ce3+,Li+ phosphor for white-light-emitting diodes and yellow-light-emitting diodes,” Appl. Phys. Lett. 90(4), 041906 (2007).
[CrossRef]

Y.-H. Won, H. S. Jang, W. B. Im, D. Y. Jeon, and J. S. Lee, “Tunable full-color-emitting La0.827Al11.9O19.09:Eu2+,Mn2+ phosphor for application to warm white-light-emitting diodes,” Appl. Phys. Lett. 89(23), 231909 (2006).
[CrossRef]

R.-J. Xie, N. Hirosaki, N. Kimura, K. Sakuma, and M. Mitomo, “2-phosphor-converted white light-emitting diodes using oxynitride/nitride phosphors,” Appl. Phys. Lett. 90(19), 191101 (2007).
[CrossRef]

R. R. Jacobs, W. F. Krupke, and M. J. Weber, “Measurement of excited-state-absorption loss for Ce3+ in Y3Al5O12 and implications for tunable 5d→4f rare-earth lasers,” Appl. Phys. Lett. 33(5), 410–412 (1978).
[CrossRef]

N. Hirosaki, R.-J. Xie, K. Kimoto, T. Sekiguchi, Y. Yamamoto, T. Suehiro, and M. Mitomo, “Characterization and properties of green-emitting β-SiAlON:Eu2+ powder phosphors for white light-emitting diodes,” Appl. Phys. Lett. 86(21), 211905 (2005).
[CrossRef]

Appl. Spectrosc. (1)

Chem. Mater. (3)

Y. Q. Li, N. Hirosaki, R.-J. Xie, T. Takeda, and M. Mitomo, “Yellow-Orange-Emitting CaAlSiN3:Ce3+ Phosphor: Sturcture, Photolumienscence, and Application in White LEDs,” Chem. Mater. 20(21), 6704–6714 (2008).
[CrossRef]

M. Krings, G. Montana, R. Dronskowski, and C. Wickleder, “α-SrNCN:Eu2+ - A Novel Efficient Orange-Emitting Phosphor,” Chem. Mater. 23(7), 1694–1699 (2011).
[CrossRef]

M. P. Saradhi and U. V. Varadaraju, “Photoluminescence Studies on Eu2+-Activated Li2SrSiO4 - a Potential Orange-Yellow Phosphor for Solid-State Lighting,” Chem. Mater. 18(22), 5267–5272 (2006).
[CrossRef]

J. Electrochem. Soc. (2)

P. V. Kelsey and J. J. Brown., “Ce3+-Activated Photoluminescence in the BaO-SrO-SiO2 system,” J. Electrochem. Soc. 123(9), 1384–1388 (1976).
[CrossRef]

H. S. Jang, Y.-H. Won, S. Vaidyanathan, D. H. Kim, and D. Y. Jeon, “Emission band change of (Sr1-xMx)3SiO5:Eu2+ (M=Ca, Ba) Phosphor for White Light Sources Using Blue/Near-Ultraviolet LEDs,” J. Electrochem. Soc. 156(6), J138–J142 (2009).
[CrossRef]

J. Lumin. (2)

H. S. Jang, W. B. Im, D. C. Lee, D. Y. Jeon, and S. S. Kim, “Enhancement of red spectral emission intensity of Y3Al5O12:Ce3+ phosphor via Pr co-doping and Tb substitution for the application to white LEDs,” J. Lumin. 126(2), 371–377 (2007).
[CrossRef]

V. P. Dotsenko, S. M. Levshov, I. V. Berezovskaya, G. B. Stryganyuk, A. S. Voloshinovskii, and N. P. Efryushina, “Luminescent properties of Eu2+ and Ce3+ ions in strontium litho-silicate Li2SrSiO4,” J. Lumin. 131(2), 310–315 (2011).
[CrossRef]

J. Mater. Res. (1)

H. He, R. Fu, H. Wang, X. Song, Z. Pan, X. Zhao, X. Zhang, and Y. Cao, “Li2SrSiO4:Eu2+ phosphor prepared by the Pechini method and its application in white light emitting diode,” J. Mater. Res. 23(12), 3288–3294 (2008).
[CrossRef]

J. Phys. Chem. C (2)

R. Ye, G. Jia, D. Deng, Y. Hua, Z. Cui, S. Zhao, L. Huang, H. Wang, C. Li, and S. Xu, “Controllable Synthesis and Tunable Colors of α- and β-Zn2SiO4:Mn2+ Nanocrystals for UV and Blue Chip Excited White LEDs,” J. Phys. Chem. C 115(21), 10851–10858 (2011).
[CrossRef]

T. Suehiro, H. Onuma, N. Hirosaki, R.-J. Xie, T. Sato, and A. Miyamoto, “Powder Synthesis of Y-α-SiAlON and Its Potential as a Phosphor Host,” J. Phys. Chem. C 114(2), 1337–1342 (2010).
[CrossRef]

Mater. Lett. (1)

G. Li, D. Deng, X. Su, Q. Wang, Y. Li, Y. Hua, L. Huang, S. Zhao, H. Wang, C. Li, and S. Xu, “Sol-gel synthesis of yellow-emitting La4Ca(SiO4)3O:Ce3+ phosphors for white-light emitting diodes,” Mater. Lett. 65(13), 2019–2021 (2011).
[CrossRef]

Opt. Express (1)

Opt. Lett. (1)

Opt. Mater. (1)

A. A. Setlur and A. M. Srivastava, “On the relationship between emission color and Ce3+ concentration in garnet phosphors,” Opt. Mater. 29(12), 1647–1652 (2007).
[CrossRef]

Phys. Rev. B (1)

B. Hammer, L. B. Hansen, and J. K. Nørskov, “Improved adsorption energetics within density-functional theory using revised Perdew–Burke–Ernzerhof functionals,” Phys. Rev. B 59(11), 7413–7421 (1999).
[CrossRef]

Phys. Rev. B Condens. Matter (2)

G. Kresse and J. Hafner, “Ab initio molecular-dynamics simulation of the liquid-metal-amorphous-semiconductor transition in germanium,” Phys. Rev. B Condens. Matter 49(20), 14251–14269 (1994).
[CrossRef] [PubMed]

G. Kresse and J. Furthmüller, “Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set,” Phys. Rev. B Condens. Matter 54(16), 11169–11186 (1996).
[CrossRef] [PubMed]

Rev. Mod. Phys. (1)

R. O. Jones and O. Gunnarsson, “The density functional formalism, its applications and prospects,” Rev. Mod. Phys. 61(3), 689–746 (1989).
[CrossRef]

Science (1)

E. F. Schubert and J. K. Kim, “Solid-State Light Sources Getting Smart,” Science 308(5726), 1274–1278 (2005).
[CrossRef] [PubMed]

Other (4)

S. Nakamura and G. Fasol, The Blue Laser Diodes: GaN Based Light Emitters and Lasers (Springer, 1996).

G. Blasse and B. C. Grabmaier, Luminescent Materials (Springer, 1994).

G. Wyszecki and W. S. Stiles, Color Science: Concepts and Methods, Quantatative Data and Formulae, 2nd ed. (John Wiley & Sons, Inc., 1982).

W. M. Yen, S. Shionoya, and H. Yamamoto, Phosphor Handbook, 2nd ed. (CRC Press, 2007).

Cited By

OSA participates in CrossRef's Cited-By Linking service. Citing articles from OSA journals and other participating publishers are listed here.

Alert me when this article is cited.


Figures (6)

Fig. 1
Fig. 1

(a) XRD pattern and (b) Raman shift spectrum of the γ-Ca2SiO4:Ce3+,Li+ phosphor. (Red line: JCPDS 49-1672 and *: impurity peak).

Fig. 2
Fig. 2

(a) Absorption spectra of γ-Ca2SiO4 (host crystal, dotted line) and γ-Ca2SiO4:Ce3+,Li+ (phosphor, solid line) and (b) PLE and PL spectra of the γ-Ca2SiO4:Ce3+,Li+ phosphor. [Inset shows digital camera images of the synthesized phosphor under room light (left) and UV light (right)].

Fig. 3
Fig. 3

(a) Normalized PL spectra and (b) the CIE color coordinates of γ-Ca2SiO4:Ce3+,Li+ phosphors with varying Ce3+ concentration under the excitation of 450 nm.

Fig. 4
Fig. 4

(a) Temperature dependent PL spectra and maximum PL intensities of γ-Ca2SiO4:Ce3+,Li+ phosphor under 450 nm excitation, (b) plot of ln[I0/I(T) – 1] vs. 1/kT, and (c) CIE color coordinates of the γ-Ca2SiO4:Ce3+,Li+ phosphor with increasing temperature.

Fig. 5
Fig. 5

(a, c, e) Crystal structure models and (b, d, f) density of states of γ-Ca2SiO4 host crystal, γ-Ca2SiO4:Ce3+Ca(1),Li+ Ca(1), and γ-Ca2SiO4:Ce3+Ca(2),Li+Ca(2) phosphors. (pink sphere: Ca at Ca(1) site, green sphere: Ca at Ca(2) site, red sphere: O, gold sphere: Si, white sphere: Ce, and grey sphere: Li, respectively).

Fig. 6
Fig. 6

(a) EL spectra and (b) CIE color coordinates of the fabricated white LEDs (open circle: white LED fabricated in this study, open triangle: YAG:Ce-based white LED) measured at forward bias currents of 10, 20, 30, 40, 50, 60, and 70 mA. (Inset shows digital camera images of the fabricated white LED by combining a blue LED with γ-Ca2SiO4:Ce3+,Li+.)

Equations (3)

Equations on this page are rendered with MathJax. Learn more.

η i = Em(λ) hc/λ dλ Ex(λ)Re(λ) hc/λ dλ = λEm(λ)dλ λ( Ex(λ)Re(λ) )dλ
η ex = Em(λ) hc/λ dλ Ex(λ) hc/λ dλ = λEm(λ) dλ λEx(λ)dλ
I(T)= I 0 1+cexp( E kT )

Metrics