Abstract

This paper reports the optical effects of a two-dimensional (2D) SiNx photonic crystal layer (PCL) on Y3Al5O12:Ce3+ (YAG:Ce) yellow ceramic plate phosphor (CPP) in order to enhance the forward emission of YAG:Ce CPP-capped high-power white light-emitting diodes (LEDs). By adding the 2D SiNx PCL with a 580 nm lattice constant, integrated yellow emission was improved by a factor of 1.72 compared to that of a conventional YAG:Ce CPP capped on a blue LED cup. This enhanced forward yellow emission is attributed to increased extraction of yellow emission light and improved absorption of blue excitation light through Bragg scattering and/or the leaky modes produced by the 2D PCLs. The introduction of 2D PCL can also reduce the wide variation of optical properties as a function of both ambient temperature and applied current, compared to those of a high-power YAG:Ce CPP-capped LED.

© 2011 OSA

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  1. S. Nakamura, T. Mukai, and M. Senoh, “Candela-class high-brightness InGaN/AlGaN double-heterostructure blue-light-emitting diodes,” Appl. Phys. Lett. 64(13), 1687–1689 (1994).
    [CrossRef]
  2. S. Nakamura, M. Senoh, N. Iwasa, S.- Nagahama, T. Yamada, and T. Mukai; “Superbright green InGaN single-quantum-well-structure light-emitting diodes,” Jpn. J. Appl. Phys. 34(Part 2, No. 10B), L1332–L1335 (1995).
    [CrossRef]
  3. S. Nakamura, M. Senoh, N. Iwasa, and S. Nagahama, “High-power InGaN single-quantum-well-structure blue and violet light-emitting diodes,” Appl. Phys. Lett. 67(13), 1868–1870 (1995).
    [CrossRef]
  4. P. Schlotter, R. Schmidt, and J. Schneider, “Luminescence conversion of blue light emitting diodes,” Appl. Phys., A Mater. Sci. Process. 64(4), 417–418 (1997).
    [CrossRef]
  5. N. Narendran, Y. Gu, J. P. Freyssinier-Nova, and Y. Zhu, “Extracting phosphor-scattered photons to improve white LED efficiency,” Phys. Status Solidi A 202(6), R60–R62 (2005).
    [CrossRef]
  6. K. Yamada, Y. Imai, and K. Ishii, “Optical simulation of light source devices composed of blue LEDs and YAG phosphor,” J. Light Visual Environ. 27(2), 70–74 (2003).
    [CrossRef]
  7. S. Tanabe, S. Fujita, A. Sakamoto, and S. Yamamoto, “Glass ceramics for solid-state lighting,” Ceram. Trans. 173, 19–25 (2006).
  8. S. Fujita, A. Sakamoto, and S. Tanabe, “Luminescence characteristics of YAG glass-ceramic phosphor for white LED,” IEEE J. Sel. Top. Quantum Electron. 14(5), 1387–1391 (2008).
    [CrossRef]
  9. S. Fujita, S. Yoshihara, A. Sakamoto, S. Yamamoto, and S. Tanabe, “YAG glass–ceramic phosphors for white LED (I): development,” Proc. SPIE 5941, 594111 (2005).
    [CrossRef]
  10. S. Nishiura, S. Tanabe, K. Fujioka, and Y. Fujimoto, “Properties of transparent Ce:YAG ceramic phosphors for white LED,” Opt. Mater. 33(5), 688–691 (2011).
    [CrossRef]
  11. W. Zhao, S. Anghel, C. Mancini, D. Amans, G. Boulon, T. Epicier, Y. Shi, X. Q. Feng, Y. B. Pan, V. chani, and A. Yoshikawa, “Ce3+ dopant segregation in Y3Al5O12 optical ceramics,” Opt. Mater. 33(5), 684–687 (2011).
    [CrossRef]
  12. S. L. Jones, D. Kumar, R. K. Singh, and P. H. Holloway, “Luminescence of pulsed laser deposited Eu doped yttrium oxide films,” Appl. Phys. Lett. 71(3), 404–406 (1997).
    [CrossRef]
  13. R. K. Singh, Z. Chen, D. Kumar, K. Cho, and M. Ollinger, “Critical issues in enhancing brightness in thin film phosphors for flat-panel display applications,” Appl. Surf. Sci. 197-198, 321–324 (2002).
    [CrossRef]
  14. J. Y. Cho, Y. R. Do, and Y.-D. Huh, “Analysis of the factors governing the enhanced photoluminescence brightness of Li-doped Y2O3:Eu thin-film phosphors,” Appl. Phys. Lett. 89(13), 131915 (2006).
    [CrossRef]
  15. J. Lu, K. Ueda, H. Yagi, T. Yanagitani, Y. Akiyama, and A. A. Kaminskii, “Neodymium doped yttrium aluminum garnet (Y3Al5O12) nanocrystalline ceramics-a new generation of solid state laser and optical materials,” J. Alloy. Comp. 341(1-2), 220–225 (2002).
    [CrossRef]
  16. T. Yanagida, H. Takahashi, T. Ito, D. Kasama, T. Enoto, M. Sato, S. Hirakuri, M. Kokubun, K. Makishima, T. Yanagitani, H. Yagi, T. Shigeta, and T. Ito, “Evaluation of properties of YAG (Ce) ceramic scintillators,” IEEE Trans. Nucl. Sci. 52(5), 1836–1841 (2005).
    [CrossRef]
  17. Y. K. Lee, J. R. Oh, and Y. R. Do, “Enhanced extraction efficiency of Y2O3:Eu3+ thin-film phosphors coated with hexagonally close-packed polystyrene nanosphere monolayers,” Appl. Phys. Lett. 91(4), 041907 (2007).
    [CrossRef]
  18. K.-Y. Ko, K. N. Lee, Y. K. Lee, and Y. R. Do, “Enhanced light extraction from SrGa2S4:Eu2+ film phosphors coated with various sizes of polystyrene nanosphere monolayers,” J. Phys. Chem. C 112(20), 7594–7598 (2008).
    [CrossRef]
  19. J. R. Oh, H. K. Park, and Y. R. Do, “Brighter photoluminescence of 2D photonic crystal-assisted Y2O3:Eu3+ thick-film phosphors over screened powder phosphors,” Electrochem. Solid-State Lett. 12(6), J58–J60 (2009).
    [CrossRef]
  20. Y. K. Lee, J. R. Oh, Y. R. Do, and Y.-D. Huh, “Strong perturbation of the guided light within Y2O3:Eu3+ thin-film phosphors coated with two-dimensional air-hole photonic crystal arrays,” Appl. Phys. Lett. 91(23), 231908 (2007).
    [CrossRef]
  21. J. R. Oh, Y. K. Lee, H. K. Park, and Y. R. Do, “Effects of symmetry, shape, and structural parameters of two-dimensional SiNx photonic crystal on the extracted light from Y2O3:Eu3+ film,” J. Appl. Phys. 105(4), 043103 (2009).
    [CrossRef]
  22. K. Y. Ko, Y. K. Lee, H. K. Park, Y.-C. Kim, and Y. R. Do, “The variation of the enhanced photoluminescence efficiency of Y2O3:Eu3+ films with the thickness to the photonic crystal layer,” Opt. Express 16(8), 5689–5696 (2008).
    [CrossRef] [PubMed]
  23. N. Ganesh, W. Zhang, P. C. Mathias, E. Chow, J. A. N. T. Soares, V. Malyarchuk, A. D. Smith, and B. T. Cunningham, “Enhanced fluorescence emission from quantum dots on a photonic crystal surface,” Nat. Nanotechnol. 2(8), 515–520 (2007).
    [CrossRef] [PubMed]
  24. J. R. Oh, J. H. Moon, H. K. Park, J. H. Park, H. Chung, J. Jeong, W. Kim, and Y. R. Do, “Wafer-scale colloidal lithography based on self-assembly of polystyrene nanospheres and atomic layer deposition,” J. Mater. Chem. 20(24), 5025–5029 (2010).
    [CrossRef]

2011

S. Nishiura, S. Tanabe, K. Fujioka, and Y. Fujimoto, “Properties of transparent Ce:YAG ceramic phosphors for white LED,” Opt. Mater. 33(5), 688–691 (2011).
[CrossRef]

W. Zhao, S. Anghel, C. Mancini, D. Amans, G. Boulon, T. Epicier, Y. Shi, X. Q. Feng, Y. B. Pan, V. chani, and A. Yoshikawa, “Ce3+ dopant segregation in Y3Al5O12 optical ceramics,” Opt. Mater. 33(5), 684–687 (2011).
[CrossRef]

2010

J. R. Oh, J. H. Moon, H. K. Park, J. H. Park, H. Chung, J. Jeong, W. Kim, and Y. R. Do, “Wafer-scale colloidal lithography based on self-assembly of polystyrene nanospheres and atomic layer deposition,” J. Mater. Chem. 20(24), 5025–5029 (2010).
[CrossRef]

2009

J. R. Oh, H. K. Park, and Y. R. Do, “Brighter photoluminescence of 2D photonic crystal-assisted Y2O3:Eu3+ thick-film phosphors over screened powder phosphors,” Electrochem. Solid-State Lett. 12(6), J58–J60 (2009).
[CrossRef]

J. R. Oh, Y. K. Lee, H. K. Park, and Y. R. Do, “Effects of symmetry, shape, and structural parameters of two-dimensional SiNx photonic crystal on the extracted light from Y2O3:Eu3+ film,” J. Appl. Phys. 105(4), 043103 (2009).
[CrossRef]

2008

K. Y. Ko, Y. K. Lee, H. K. Park, Y.-C. Kim, and Y. R. Do, “The variation of the enhanced photoluminescence efficiency of Y2O3:Eu3+ films with the thickness to the photonic crystal layer,” Opt. Express 16(8), 5689–5696 (2008).
[CrossRef] [PubMed]

K.-Y. Ko, K. N. Lee, Y. K. Lee, and Y. R. Do, “Enhanced light extraction from SrGa2S4:Eu2+ film phosphors coated with various sizes of polystyrene nanosphere monolayers,” J. Phys. Chem. C 112(20), 7594–7598 (2008).
[CrossRef]

S. Fujita, A. Sakamoto, and S. Tanabe, “Luminescence characteristics of YAG glass-ceramic phosphor for white LED,” IEEE J. Sel. Top. Quantum Electron. 14(5), 1387–1391 (2008).
[CrossRef]

2007

Y. K. Lee, J. R. Oh, and Y. R. Do, “Enhanced extraction efficiency of Y2O3:Eu3+ thin-film phosphors coated with hexagonally close-packed polystyrene nanosphere monolayers,” Appl. Phys. Lett. 91(4), 041907 (2007).
[CrossRef]

N. Ganesh, W. Zhang, P. C. Mathias, E. Chow, J. A. N. T. Soares, V. Malyarchuk, A. D. Smith, and B. T. Cunningham, “Enhanced fluorescence emission from quantum dots on a photonic crystal surface,” Nat. Nanotechnol. 2(8), 515–520 (2007).
[CrossRef] [PubMed]

Y. K. Lee, J. R. Oh, Y. R. Do, and Y.-D. Huh, “Strong perturbation of the guided light within Y2O3:Eu3+ thin-film phosphors coated with two-dimensional air-hole photonic crystal arrays,” Appl. Phys. Lett. 91(23), 231908 (2007).
[CrossRef]

2006

J. Y. Cho, Y. R. Do, and Y.-D. Huh, “Analysis of the factors governing the enhanced photoluminescence brightness of Li-doped Y2O3:Eu thin-film phosphors,” Appl. Phys. Lett. 89(13), 131915 (2006).
[CrossRef]

S. Tanabe, S. Fujita, A. Sakamoto, and S. Yamamoto, “Glass ceramics for solid-state lighting,” Ceram. Trans. 173, 19–25 (2006).

2005

T. Yanagida, H. Takahashi, T. Ito, D. Kasama, T. Enoto, M. Sato, S. Hirakuri, M. Kokubun, K. Makishima, T. Yanagitani, H. Yagi, T. Shigeta, and T. Ito, “Evaluation of properties of YAG (Ce) ceramic scintillators,” IEEE Trans. Nucl. Sci. 52(5), 1836–1841 (2005).
[CrossRef]

S. Fujita, S. Yoshihara, A. Sakamoto, S. Yamamoto, and S. Tanabe, “YAG glass–ceramic phosphors for white LED (I): development,” Proc. SPIE 5941, 594111 (2005).
[CrossRef]

N. Narendran, Y. Gu, J. P. Freyssinier-Nova, and Y. Zhu, “Extracting phosphor-scattered photons to improve white LED efficiency,” Phys. Status Solidi A 202(6), R60–R62 (2005).
[CrossRef]

2003

K. Yamada, Y. Imai, and K. Ishii, “Optical simulation of light source devices composed of blue LEDs and YAG phosphor,” J. Light Visual Environ. 27(2), 70–74 (2003).
[CrossRef]

2002

J. Lu, K. Ueda, H. Yagi, T. Yanagitani, Y. Akiyama, and A. A. Kaminskii, “Neodymium doped yttrium aluminum garnet (Y3Al5O12) nanocrystalline ceramics-a new generation of solid state laser and optical materials,” J. Alloy. Comp. 341(1-2), 220–225 (2002).
[CrossRef]

R. K. Singh, Z. Chen, D. Kumar, K. Cho, and M. Ollinger, “Critical issues in enhancing brightness in thin film phosphors for flat-panel display applications,” Appl. Surf. Sci. 197-198, 321–324 (2002).
[CrossRef]

1997

S. L. Jones, D. Kumar, R. K. Singh, and P. H. Holloway, “Luminescence of pulsed laser deposited Eu doped yttrium oxide films,” Appl. Phys. Lett. 71(3), 404–406 (1997).
[CrossRef]

P. Schlotter, R. Schmidt, and J. Schneider, “Luminescence conversion of blue light emitting diodes,” Appl. Phys., A Mater. Sci. Process. 64(4), 417–418 (1997).
[CrossRef]

1995

S. Nakamura, M. Senoh, N. Iwasa, S.- Nagahama, T. Yamada, and T. Mukai; “Superbright green InGaN single-quantum-well-structure light-emitting diodes,” Jpn. J. Appl. Phys. 34(Part 2, No. 10B), L1332–L1335 (1995).
[CrossRef]

S. Nakamura, M. Senoh, N. Iwasa, and S. Nagahama, “High-power InGaN single-quantum-well-structure blue and violet light-emitting diodes,” Appl. Phys. Lett. 67(13), 1868–1870 (1995).
[CrossRef]

1994

S. Nakamura, T. Mukai, and M. Senoh, “Candela-class high-brightness InGaN/AlGaN double-heterostructure blue-light-emitting diodes,” Appl. Phys. Lett. 64(13), 1687–1689 (1994).
[CrossRef]

Akiyama, Y.

J. Lu, K. Ueda, H. Yagi, T. Yanagitani, Y. Akiyama, and A. A. Kaminskii, “Neodymium doped yttrium aluminum garnet (Y3Al5O12) nanocrystalline ceramics-a new generation of solid state laser and optical materials,” J. Alloy. Comp. 341(1-2), 220–225 (2002).
[CrossRef]

Amans, D.

W. Zhao, S. Anghel, C. Mancini, D. Amans, G. Boulon, T. Epicier, Y. Shi, X. Q. Feng, Y. B. Pan, V. chani, and A. Yoshikawa, “Ce3+ dopant segregation in Y3Al5O12 optical ceramics,” Opt. Mater. 33(5), 684–687 (2011).
[CrossRef]

Anghel, S.

W. Zhao, S. Anghel, C. Mancini, D. Amans, G. Boulon, T. Epicier, Y. Shi, X. Q. Feng, Y. B. Pan, V. chani, and A. Yoshikawa, “Ce3+ dopant segregation in Y3Al5O12 optical ceramics,” Opt. Mater. 33(5), 684–687 (2011).
[CrossRef]

Boulon, G.

W. Zhao, S. Anghel, C. Mancini, D. Amans, G. Boulon, T. Epicier, Y. Shi, X. Q. Feng, Y. B. Pan, V. chani, and A. Yoshikawa, “Ce3+ dopant segregation in Y3Al5O12 optical ceramics,” Opt. Mater. 33(5), 684–687 (2011).
[CrossRef]

chani, V.

W. Zhao, S. Anghel, C. Mancini, D. Amans, G. Boulon, T. Epicier, Y. Shi, X. Q. Feng, Y. B. Pan, V. chani, and A. Yoshikawa, “Ce3+ dopant segregation in Y3Al5O12 optical ceramics,” Opt. Mater. 33(5), 684–687 (2011).
[CrossRef]

Chen, Z.

R. K. Singh, Z. Chen, D. Kumar, K. Cho, and M. Ollinger, “Critical issues in enhancing brightness in thin film phosphors for flat-panel display applications,” Appl. Surf. Sci. 197-198, 321–324 (2002).
[CrossRef]

Cho, J. Y.

J. Y. Cho, Y. R. Do, and Y.-D. Huh, “Analysis of the factors governing the enhanced photoluminescence brightness of Li-doped Y2O3:Eu thin-film phosphors,” Appl. Phys. Lett. 89(13), 131915 (2006).
[CrossRef]

Cho, K.

R. K. Singh, Z. Chen, D. Kumar, K. Cho, and M. Ollinger, “Critical issues in enhancing brightness in thin film phosphors for flat-panel display applications,” Appl. Surf. Sci. 197-198, 321–324 (2002).
[CrossRef]

Chow, E.

N. Ganesh, W. Zhang, P. C. Mathias, E. Chow, J. A. N. T. Soares, V. Malyarchuk, A. D. Smith, and B. T. Cunningham, “Enhanced fluorescence emission from quantum dots on a photonic crystal surface,” Nat. Nanotechnol. 2(8), 515–520 (2007).
[CrossRef] [PubMed]

Chung, H.

J. R. Oh, J. H. Moon, H. K. Park, J. H. Park, H. Chung, J. Jeong, W. Kim, and Y. R. Do, “Wafer-scale colloidal lithography based on self-assembly of polystyrene nanospheres and atomic layer deposition,” J. Mater. Chem. 20(24), 5025–5029 (2010).
[CrossRef]

Cunningham, B. T.

N. Ganesh, W. Zhang, P. C. Mathias, E. Chow, J. A. N. T. Soares, V. Malyarchuk, A. D. Smith, and B. T. Cunningham, “Enhanced fluorescence emission from quantum dots on a photonic crystal surface,” Nat. Nanotechnol. 2(8), 515–520 (2007).
[CrossRef] [PubMed]

Do, Y. R.

J. R. Oh, J. H. Moon, H. K. Park, J. H. Park, H. Chung, J. Jeong, W. Kim, and Y. R. Do, “Wafer-scale colloidal lithography based on self-assembly of polystyrene nanospheres and atomic layer deposition,” J. Mater. Chem. 20(24), 5025–5029 (2010).
[CrossRef]

J. R. Oh, Y. K. Lee, H. K. Park, and Y. R. Do, “Effects of symmetry, shape, and structural parameters of two-dimensional SiNx photonic crystal on the extracted light from Y2O3:Eu3+ film,” J. Appl. Phys. 105(4), 043103 (2009).
[CrossRef]

J. R. Oh, H. K. Park, and Y. R. Do, “Brighter photoluminescence of 2D photonic crystal-assisted Y2O3:Eu3+ thick-film phosphors over screened powder phosphors,” Electrochem. Solid-State Lett. 12(6), J58–J60 (2009).
[CrossRef]

K.-Y. Ko, K. N. Lee, Y. K. Lee, and Y. R. Do, “Enhanced light extraction from SrGa2S4:Eu2+ film phosphors coated with various sizes of polystyrene nanosphere monolayers,” J. Phys. Chem. C 112(20), 7594–7598 (2008).
[CrossRef]

K. Y. Ko, Y. K. Lee, H. K. Park, Y.-C. Kim, and Y. R. Do, “The variation of the enhanced photoluminescence efficiency of Y2O3:Eu3+ films with the thickness to the photonic crystal layer,” Opt. Express 16(8), 5689–5696 (2008).
[CrossRef] [PubMed]

Y. K. Lee, J. R. Oh, Y. R. Do, and Y.-D. Huh, “Strong perturbation of the guided light within Y2O3:Eu3+ thin-film phosphors coated with two-dimensional air-hole photonic crystal arrays,” Appl. Phys. Lett. 91(23), 231908 (2007).
[CrossRef]

Y. K. Lee, J. R. Oh, and Y. R. Do, “Enhanced extraction efficiency of Y2O3:Eu3+ thin-film phosphors coated with hexagonally close-packed polystyrene nanosphere monolayers,” Appl. Phys. Lett. 91(4), 041907 (2007).
[CrossRef]

J. Y. Cho, Y. R. Do, and Y.-D. Huh, “Analysis of the factors governing the enhanced photoluminescence brightness of Li-doped Y2O3:Eu thin-film phosphors,” Appl. Phys. Lett. 89(13), 131915 (2006).
[CrossRef]

Enoto, T.

T. Yanagida, H. Takahashi, T. Ito, D. Kasama, T. Enoto, M. Sato, S. Hirakuri, M. Kokubun, K. Makishima, T. Yanagitani, H. Yagi, T. Shigeta, and T. Ito, “Evaluation of properties of YAG (Ce) ceramic scintillators,” IEEE Trans. Nucl. Sci. 52(5), 1836–1841 (2005).
[CrossRef]

Epicier, T.

W. Zhao, S. Anghel, C. Mancini, D. Amans, G. Boulon, T. Epicier, Y. Shi, X. Q. Feng, Y. B. Pan, V. chani, and A. Yoshikawa, “Ce3+ dopant segregation in Y3Al5O12 optical ceramics,” Opt. Mater. 33(5), 684–687 (2011).
[CrossRef]

Feng, X. Q.

W. Zhao, S. Anghel, C. Mancini, D. Amans, G. Boulon, T. Epicier, Y. Shi, X. Q. Feng, Y. B. Pan, V. chani, and A. Yoshikawa, “Ce3+ dopant segregation in Y3Al5O12 optical ceramics,” Opt. Mater. 33(5), 684–687 (2011).
[CrossRef]

Freyssinier-Nova, J. P.

N. Narendran, Y. Gu, J. P. Freyssinier-Nova, and Y. Zhu, “Extracting phosphor-scattered photons to improve white LED efficiency,” Phys. Status Solidi A 202(6), R60–R62 (2005).
[CrossRef]

Fujimoto, Y.

S. Nishiura, S. Tanabe, K. Fujioka, and Y. Fujimoto, “Properties of transparent Ce:YAG ceramic phosphors for white LED,” Opt. Mater. 33(5), 688–691 (2011).
[CrossRef]

Fujioka, K.

S. Nishiura, S. Tanabe, K. Fujioka, and Y. Fujimoto, “Properties of transparent Ce:YAG ceramic phosphors for white LED,” Opt. Mater. 33(5), 688–691 (2011).
[CrossRef]

Fujita, S.

S. Fujita, A. Sakamoto, and S. Tanabe, “Luminescence characteristics of YAG glass-ceramic phosphor for white LED,” IEEE J. Sel. Top. Quantum Electron. 14(5), 1387–1391 (2008).
[CrossRef]

S. Tanabe, S. Fujita, A. Sakamoto, and S. Yamamoto, “Glass ceramics for solid-state lighting,” Ceram. Trans. 173, 19–25 (2006).

S. Fujita, S. Yoshihara, A. Sakamoto, S. Yamamoto, and S. Tanabe, “YAG glass–ceramic phosphors for white LED (I): development,” Proc. SPIE 5941, 594111 (2005).
[CrossRef]

Ganesh, N.

N. Ganesh, W. Zhang, P. C. Mathias, E. Chow, J. A. N. T. Soares, V. Malyarchuk, A. D. Smith, and B. T. Cunningham, “Enhanced fluorescence emission from quantum dots on a photonic crystal surface,” Nat. Nanotechnol. 2(8), 515–520 (2007).
[CrossRef] [PubMed]

Gu, Y.

N. Narendran, Y. Gu, J. P. Freyssinier-Nova, and Y. Zhu, “Extracting phosphor-scattered photons to improve white LED efficiency,” Phys. Status Solidi A 202(6), R60–R62 (2005).
[CrossRef]

Hirakuri, S.

T. Yanagida, H. Takahashi, T. Ito, D. Kasama, T. Enoto, M. Sato, S. Hirakuri, M. Kokubun, K. Makishima, T. Yanagitani, H. Yagi, T. Shigeta, and T. Ito, “Evaluation of properties of YAG (Ce) ceramic scintillators,” IEEE Trans. Nucl. Sci. 52(5), 1836–1841 (2005).
[CrossRef]

Holloway, P. H.

S. L. Jones, D. Kumar, R. K. Singh, and P. H. Holloway, “Luminescence of pulsed laser deposited Eu doped yttrium oxide films,” Appl. Phys. Lett. 71(3), 404–406 (1997).
[CrossRef]

Huh, Y.-D.

Y. K. Lee, J. R. Oh, Y. R. Do, and Y.-D. Huh, “Strong perturbation of the guided light within Y2O3:Eu3+ thin-film phosphors coated with two-dimensional air-hole photonic crystal arrays,” Appl. Phys. Lett. 91(23), 231908 (2007).
[CrossRef]

J. Y. Cho, Y. R. Do, and Y.-D. Huh, “Analysis of the factors governing the enhanced photoluminescence brightness of Li-doped Y2O3:Eu thin-film phosphors,” Appl. Phys. Lett. 89(13), 131915 (2006).
[CrossRef]

Imai, Y.

K. Yamada, Y. Imai, and K. Ishii, “Optical simulation of light source devices composed of blue LEDs and YAG phosphor,” J. Light Visual Environ. 27(2), 70–74 (2003).
[CrossRef]

Ishii, K.

K. Yamada, Y. Imai, and K. Ishii, “Optical simulation of light source devices composed of blue LEDs and YAG phosphor,” J. Light Visual Environ. 27(2), 70–74 (2003).
[CrossRef]

Ito, T.

T. Yanagida, H. Takahashi, T. Ito, D. Kasama, T. Enoto, M. Sato, S. Hirakuri, M. Kokubun, K. Makishima, T. Yanagitani, H. Yagi, T. Shigeta, and T. Ito, “Evaluation of properties of YAG (Ce) ceramic scintillators,” IEEE Trans. Nucl. Sci. 52(5), 1836–1841 (2005).
[CrossRef]

T. Yanagida, H. Takahashi, T. Ito, D. Kasama, T. Enoto, M. Sato, S. Hirakuri, M. Kokubun, K. Makishima, T. Yanagitani, H. Yagi, T. Shigeta, and T. Ito, “Evaluation of properties of YAG (Ce) ceramic scintillators,” IEEE Trans. Nucl. Sci. 52(5), 1836–1841 (2005).
[CrossRef]

Iwasa, N.

S. Nakamura, M. Senoh, N. Iwasa, and S. Nagahama, “High-power InGaN single-quantum-well-structure blue and violet light-emitting diodes,” Appl. Phys. Lett. 67(13), 1868–1870 (1995).
[CrossRef]

S. Nakamura, M. Senoh, N. Iwasa, S.- Nagahama, T. Yamada, and T. Mukai; “Superbright green InGaN single-quantum-well-structure light-emitting diodes,” Jpn. J. Appl. Phys. 34(Part 2, No. 10B), L1332–L1335 (1995).
[CrossRef]

Jeong, J.

J. R. Oh, J. H. Moon, H. K. Park, J. H. Park, H. Chung, J. Jeong, W. Kim, and Y. R. Do, “Wafer-scale colloidal lithography based on self-assembly of polystyrene nanospheres and atomic layer deposition,” J. Mater. Chem. 20(24), 5025–5029 (2010).
[CrossRef]

Jones, S. L.

S. L. Jones, D. Kumar, R. K. Singh, and P. H. Holloway, “Luminescence of pulsed laser deposited Eu doped yttrium oxide films,” Appl. Phys. Lett. 71(3), 404–406 (1997).
[CrossRef]

Kaminskii, A. A.

J. Lu, K. Ueda, H. Yagi, T. Yanagitani, Y. Akiyama, and A. A. Kaminskii, “Neodymium doped yttrium aluminum garnet (Y3Al5O12) nanocrystalline ceramics-a new generation of solid state laser and optical materials,” J. Alloy. Comp. 341(1-2), 220–225 (2002).
[CrossRef]

Kasama, D.

T. Yanagida, H. Takahashi, T. Ito, D. Kasama, T. Enoto, M. Sato, S. Hirakuri, M. Kokubun, K. Makishima, T. Yanagitani, H. Yagi, T. Shigeta, and T. Ito, “Evaluation of properties of YAG (Ce) ceramic scintillators,” IEEE Trans. Nucl. Sci. 52(5), 1836–1841 (2005).
[CrossRef]

Kim, W.

J. R. Oh, J. H. Moon, H. K. Park, J. H. Park, H. Chung, J. Jeong, W. Kim, and Y. R. Do, “Wafer-scale colloidal lithography based on self-assembly of polystyrene nanospheres and atomic layer deposition,” J. Mater. Chem. 20(24), 5025–5029 (2010).
[CrossRef]

Kim, Y.-C.

Ko, K. Y.

Ko, K.-Y.

K.-Y. Ko, K. N. Lee, Y. K. Lee, and Y. R. Do, “Enhanced light extraction from SrGa2S4:Eu2+ film phosphors coated with various sizes of polystyrene nanosphere monolayers,” J. Phys. Chem. C 112(20), 7594–7598 (2008).
[CrossRef]

Kokubun, M.

T. Yanagida, H. Takahashi, T. Ito, D. Kasama, T. Enoto, M. Sato, S. Hirakuri, M. Kokubun, K. Makishima, T. Yanagitani, H. Yagi, T. Shigeta, and T. Ito, “Evaluation of properties of YAG (Ce) ceramic scintillators,” IEEE Trans. Nucl. Sci. 52(5), 1836–1841 (2005).
[CrossRef]

Kumar, D.

R. K. Singh, Z. Chen, D. Kumar, K. Cho, and M. Ollinger, “Critical issues in enhancing brightness in thin film phosphors for flat-panel display applications,” Appl. Surf. Sci. 197-198, 321–324 (2002).
[CrossRef]

S. L. Jones, D. Kumar, R. K. Singh, and P. H. Holloway, “Luminescence of pulsed laser deposited Eu doped yttrium oxide films,” Appl. Phys. Lett. 71(3), 404–406 (1997).
[CrossRef]

Lee, K. N.

K.-Y. Ko, K. N. Lee, Y. K. Lee, and Y. R. Do, “Enhanced light extraction from SrGa2S4:Eu2+ film phosphors coated with various sizes of polystyrene nanosphere monolayers,” J. Phys. Chem. C 112(20), 7594–7598 (2008).
[CrossRef]

Lee, Y. K.

J. R. Oh, Y. K. Lee, H. K. Park, and Y. R. Do, “Effects of symmetry, shape, and structural parameters of two-dimensional SiNx photonic crystal on the extracted light from Y2O3:Eu3+ film,” J. Appl. Phys. 105(4), 043103 (2009).
[CrossRef]

K. Y. Ko, Y. K. Lee, H. K. Park, Y.-C. Kim, and Y. R. Do, “The variation of the enhanced photoluminescence efficiency of Y2O3:Eu3+ films with the thickness to the photonic crystal layer,” Opt. Express 16(8), 5689–5696 (2008).
[CrossRef] [PubMed]

K.-Y. Ko, K. N. Lee, Y. K. Lee, and Y. R. Do, “Enhanced light extraction from SrGa2S4:Eu2+ film phosphors coated with various sizes of polystyrene nanosphere monolayers,” J. Phys. Chem. C 112(20), 7594–7598 (2008).
[CrossRef]

Y. K. Lee, J. R. Oh, and Y. R. Do, “Enhanced extraction efficiency of Y2O3:Eu3+ thin-film phosphors coated with hexagonally close-packed polystyrene nanosphere monolayers,” Appl. Phys. Lett. 91(4), 041907 (2007).
[CrossRef]

Y. K. Lee, J. R. Oh, Y. R. Do, and Y.-D. Huh, “Strong perturbation of the guided light within Y2O3:Eu3+ thin-film phosphors coated with two-dimensional air-hole photonic crystal arrays,” Appl. Phys. Lett. 91(23), 231908 (2007).
[CrossRef]

Lu, J.

J. Lu, K. Ueda, H. Yagi, T. Yanagitani, Y. Akiyama, and A. A. Kaminskii, “Neodymium doped yttrium aluminum garnet (Y3Al5O12) nanocrystalline ceramics-a new generation of solid state laser and optical materials,” J. Alloy. Comp. 341(1-2), 220–225 (2002).
[CrossRef]

Makishima, K.

T. Yanagida, H. Takahashi, T. Ito, D. Kasama, T. Enoto, M. Sato, S. Hirakuri, M. Kokubun, K. Makishima, T. Yanagitani, H. Yagi, T. Shigeta, and T. Ito, “Evaluation of properties of YAG (Ce) ceramic scintillators,” IEEE Trans. Nucl. Sci. 52(5), 1836–1841 (2005).
[CrossRef]

Malyarchuk, V.

N. Ganesh, W. Zhang, P. C. Mathias, E. Chow, J. A. N. T. Soares, V. Malyarchuk, A. D. Smith, and B. T. Cunningham, “Enhanced fluorescence emission from quantum dots on a photonic crystal surface,” Nat. Nanotechnol. 2(8), 515–520 (2007).
[CrossRef] [PubMed]

Mancini, C.

W. Zhao, S. Anghel, C. Mancini, D. Amans, G. Boulon, T. Epicier, Y. Shi, X. Q. Feng, Y. B. Pan, V. chani, and A. Yoshikawa, “Ce3+ dopant segregation in Y3Al5O12 optical ceramics,” Opt. Mater. 33(5), 684–687 (2011).
[CrossRef]

Mathias, P. C.

N. Ganesh, W. Zhang, P. C. Mathias, E. Chow, J. A. N. T. Soares, V. Malyarchuk, A. D. Smith, and B. T. Cunningham, “Enhanced fluorescence emission from quantum dots on a photonic crystal surface,” Nat. Nanotechnol. 2(8), 515–520 (2007).
[CrossRef] [PubMed]

Moon, J. H.

J. R. Oh, J. H. Moon, H. K. Park, J. H. Park, H. Chung, J. Jeong, W. Kim, and Y. R. Do, “Wafer-scale colloidal lithography based on self-assembly of polystyrene nanospheres and atomic layer deposition,” J. Mater. Chem. 20(24), 5025–5029 (2010).
[CrossRef]

Mukai, T.

S. Nakamura, M. Senoh, N. Iwasa, S.- Nagahama, T. Yamada, and T. Mukai; “Superbright green InGaN single-quantum-well-structure light-emitting diodes,” Jpn. J. Appl. Phys. 34(Part 2, No. 10B), L1332–L1335 (1995).
[CrossRef]

S. Nakamura, T. Mukai, and M. Senoh, “Candela-class high-brightness InGaN/AlGaN double-heterostructure blue-light-emitting diodes,” Appl. Phys. Lett. 64(13), 1687–1689 (1994).
[CrossRef]

Nagahama, S.

S. Nakamura, M. Senoh, N. Iwasa, and S. Nagahama, “High-power InGaN single-quantum-well-structure blue and violet light-emitting diodes,” Appl. Phys. Lett. 67(13), 1868–1870 (1995).
[CrossRef]

Nagahama, S.-

S. Nakamura, M. Senoh, N. Iwasa, S.- Nagahama, T. Yamada, and T. Mukai; “Superbright green InGaN single-quantum-well-structure light-emitting diodes,” Jpn. J. Appl. Phys. 34(Part 2, No. 10B), L1332–L1335 (1995).
[CrossRef]

Nakamura, S.

S. Nakamura, M. Senoh, N. Iwasa, and S. Nagahama, “High-power InGaN single-quantum-well-structure blue and violet light-emitting diodes,” Appl. Phys. Lett. 67(13), 1868–1870 (1995).
[CrossRef]

S. Nakamura, M. Senoh, N. Iwasa, S.- Nagahama, T. Yamada, and T. Mukai; “Superbright green InGaN single-quantum-well-structure light-emitting diodes,” Jpn. J. Appl. Phys. 34(Part 2, No. 10B), L1332–L1335 (1995).
[CrossRef]

S. Nakamura, T. Mukai, and M. Senoh, “Candela-class high-brightness InGaN/AlGaN double-heterostructure blue-light-emitting diodes,” Appl. Phys. Lett. 64(13), 1687–1689 (1994).
[CrossRef]

Narendran, N.

N. Narendran, Y. Gu, J. P. Freyssinier-Nova, and Y. Zhu, “Extracting phosphor-scattered photons to improve white LED efficiency,” Phys. Status Solidi A 202(6), R60–R62 (2005).
[CrossRef]

Nishiura, S.

S. Nishiura, S. Tanabe, K. Fujioka, and Y. Fujimoto, “Properties of transparent Ce:YAG ceramic phosphors for white LED,” Opt. Mater. 33(5), 688–691 (2011).
[CrossRef]

Oh, J. R.

J. R. Oh, J. H. Moon, H. K. Park, J. H. Park, H. Chung, J. Jeong, W. Kim, and Y. R. Do, “Wafer-scale colloidal lithography based on self-assembly of polystyrene nanospheres and atomic layer deposition,” J. Mater. Chem. 20(24), 5025–5029 (2010).
[CrossRef]

J. R. Oh, Y. K. Lee, H. K. Park, and Y. R. Do, “Effects of symmetry, shape, and structural parameters of two-dimensional SiNx photonic crystal on the extracted light from Y2O3:Eu3+ film,” J. Appl. Phys. 105(4), 043103 (2009).
[CrossRef]

J. R. Oh, H. K. Park, and Y. R. Do, “Brighter photoluminescence of 2D photonic crystal-assisted Y2O3:Eu3+ thick-film phosphors over screened powder phosphors,” Electrochem. Solid-State Lett. 12(6), J58–J60 (2009).
[CrossRef]

Y. K. Lee, J. R. Oh, and Y. R. Do, “Enhanced extraction efficiency of Y2O3:Eu3+ thin-film phosphors coated with hexagonally close-packed polystyrene nanosphere monolayers,” Appl. Phys. Lett. 91(4), 041907 (2007).
[CrossRef]

Y. K. Lee, J. R. Oh, Y. R. Do, and Y.-D. Huh, “Strong perturbation of the guided light within Y2O3:Eu3+ thin-film phosphors coated with two-dimensional air-hole photonic crystal arrays,” Appl. Phys. Lett. 91(23), 231908 (2007).
[CrossRef]

Ollinger, M.

R. K. Singh, Z. Chen, D. Kumar, K. Cho, and M. Ollinger, “Critical issues in enhancing brightness in thin film phosphors for flat-panel display applications,” Appl. Surf. Sci. 197-198, 321–324 (2002).
[CrossRef]

Pan, Y. B.

W. Zhao, S. Anghel, C. Mancini, D. Amans, G. Boulon, T. Epicier, Y. Shi, X. Q. Feng, Y. B. Pan, V. chani, and A. Yoshikawa, “Ce3+ dopant segregation in Y3Al5O12 optical ceramics,” Opt. Mater. 33(5), 684–687 (2011).
[CrossRef]

Park, H. K.

J. R. Oh, J. H. Moon, H. K. Park, J. H. Park, H. Chung, J. Jeong, W. Kim, and Y. R. Do, “Wafer-scale colloidal lithography based on self-assembly of polystyrene nanospheres and atomic layer deposition,” J. Mater. Chem. 20(24), 5025–5029 (2010).
[CrossRef]

J. R. Oh, H. K. Park, and Y. R. Do, “Brighter photoluminescence of 2D photonic crystal-assisted Y2O3:Eu3+ thick-film phosphors over screened powder phosphors,” Electrochem. Solid-State Lett. 12(6), J58–J60 (2009).
[CrossRef]

J. R. Oh, Y. K. Lee, H. K. Park, and Y. R. Do, “Effects of symmetry, shape, and structural parameters of two-dimensional SiNx photonic crystal on the extracted light from Y2O3:Eu3+ film,” J. Appl. Phys. 105(4), 043103 (2009).
[CrossRef]

K. Y. Ko, Y. K. Lee, H. K. Park, Y.-C. Kim, and Y. R. Do, “The variation of the enhanced photoluminescence efficiency of Y2O3:Eu3+ films with the thickness to the photonic crystal layer,” Opt. Express 16(8), 5689–5696 (2008).
[CrossRef] [PubMed]

Park, J. H.

J. R. Oh, J. H. Moon, H. K. Park, J. H. Park, H. Chung, J. Jeong, W. Kim, and Y. R. Do, “Wafer-scale colloidal lithography based on self-assembly of polystyrene nanospheres and atomic layer deposition,” J. Mater. Chem. 20(24), 5025–5029 (2010).
[CrossRef]

Sakamoto, A.

S. Fujita, A. Sakamoto, and S. Tanabe, “Luminescence characteristics of YAG glass-ceramic phosphor for white LED,” IEEE J. Sel. Top. Quantum Electron. 14(5), 1387–1391 (2008).
[CrossRef]

S. Tanabe, S. Fujita, A. Sakamoto, and S. Yamamoto, “Glass ceramics for solid-state lighting,” Ceram. Trans. 173, 19–25 (2006).

S. Fujita, S. Yoshihara, A. Sakamoto, S. Yamamoto, and S. Tanabe, “YAG glass–ceramic phosphors for white LED (I): development,” Proc. SPIE 5941, 594111 (2005).
[CrossRef]

Sato, M.

T. Yanagida, H. Takahashi, T. Ito, D. Kasama, T. Enoto, M. Sato, S. Hirakuri, M. Kokubun, K. Makishima, T. Yanagitani, H. Yagi, T. Shigeta, and T. Ito, “Evaluation of properties of YAG (Ce) ceramic scintillators,” IEEE Trans. Nucl. Sci. 52(5), 1836–1841 (2005).
[CrossRef]

Schlotter, P.

P. Schlotter, R. Schmidt, and J. Schneider, “Luminescence conversion of blue light emitting diodes,” Appl. Phys., A Mater. Sci. Process. 64(4), 417–418 (1997).
[CrossRef]

Schmidt, R.

P. Schlotter, R. Schmidt, and J. Schneider, “Luminescence conversion of blue light emitting diodes,” Appl. Phys., A Mater. Sci. Process. 64(4), 417–418 (1997).
[CrossRef]

Schneider, J.

P. Schlotter, R. Schmidt, and J. Schneider, “Luminescence conversion of blue light emitting diodes,” Appl. Phys., A Mater. Sci. Process. 64(4), 417–418 (1997).
[CrossRef]

Senoh, M.

S. Nakamura, M. Senoh, N. Iwasa, S.- Nagahama, T. Yamada, and T. Mukai; “Superbright green InGaN single-quantum-well-structure light-emitting diodes,” Jpn. J. Appl. Phys. 34(Part 2, No. 10B), L1332–L1335 (1995).
[CrossRef]

S. Nakamura, M. Senoh, N. Iwasa, and S. Nagahama, “High-power InGaN single-quantum-well-structure blue and violet light-emitting diodes,” Appl. Phys. Lett. 67(13), 1868–1870 (1995).
[CrossRef]

S. Nakamura, T. Mukai, and M. Senoh, “Candela-class high-brightness InGaN/AlGaN double-heterostructure blue-light-emitting diodes,” Appl. Phys. Lett. 64(13), 1687–1689 (1994).
[CrossRef]

Shi, Y.

W. Zhao, S. Anghel, C. Mancini, D. Amans, G. Boulon, T. Epicier, Y. Shi, X. Q. Feng, Y. B. Pan, V. chani, and A. Yoshikawa, “Ce3+ dopant segregation in Y3Al5O12 optical ceramics,” Opt. Mater. 33(5), 684–687 (2011).
[CrossRef]

Shigeta, T.

T. Yanagida, H. Takahashi, T. Ito, D. Kasama, T. Enoto, M. Sato, S. Hirakuri, M. Kokubun, K. Makishima, T. Yanagitani, H. Yagi, T. Shigeta, and T. Ito, “Evaluation of properties of YAG (Ce) ceramic scintillators,” IEEE Trans. Nucl. Sci. 52(5), 1836–1841 (2005).
[CrossRef]

Singh, R. K.

R. K. Singh, Z. Chen, D. Kumar, K. Cho, and M. Ollinger, “Critical issues in enhancing brightness in thin film phosphors for flat-panel display applications,” Appl. Surf. Sci. 197-198, 321–324 (2002).
[CrossRef]

S. L. Jones, D. Kumar, R. K. Singh, and P. H. Holloway, “Luminescence of pulsed laser deposited Eu doped yttrium oxide films,” Appl. Phys. Lett. 71(3), 404–406 (1997).
[CrossRef]

Smith, A. D.

N. Ganesh, W. Zhang, P. C. Mathias, E. Chow, J. A. N. T. Soares, V. Malyarchuk, A. D. Smith, and B. T. Cunningham, “Enhanced fluorescence emission from quantum dots on a photonic crystal surface,” Nat. Nanotechnol. 2(8), 515–520 (2007).
[CrossRef] [PubMed]

Soares, J. A. N. T.

N. Ganesh, W. Zhang, P. C. Mathias, E. Chow, J. A. N. T. Soares, V. Malyarchuk, A. D. Smith, and B. T. Cunningham, “Enhanced fluorescence emission from quantum dots on a photonic crystal surface,” Nat. Nanotechnol. 2(8), 515–520 (2007).
[CrossRef] [PubMed]

Takahashi, H.

T. Yanagida, H. Takahashi, T. Ito, D. Kasama, T. Enoto, M. Sato, S. Hirakuri, M. Kokubun, K. Makishima, T. Yanagitani, H. Yagi, T. Shigeta, and T. Ito, “Evaluation of properties of YAG (Ce) ceramic scintillators,” IEEE Trans. Nucl. Sci. 52(5), 1836–1841 (2005).
[CrossRef]

Tanabe, S.

S. Nishiura, S. Tanabe, K. Fujioka, and Y. Fujimoto, “Properties of transparent Ce:YAG ceramic phosphors for white LED,” Opt. Mater. 33(5), 688–691 (2011).
[CrossRef]

S. Fujita, A. Sakamoto, and S. Tanabe, “Luminescence characteristics of YAG glass-ceramic phosphor for white LED,” IEEE J. Sel. Top. Quantum Electron. 14(5), 1387–1391 (2008).
[CrossRef]

S. Tanabe, S. Fujita, A. Sakamoto, and S. Yamamoto, “Glass ceramics for solid-state lighting,” Ceram. Trans. 173, 19–25 (2006).

S. Fujita, S. Yoshihara, A. Sakamoto, S. Yamamoto, and S. Tanabe, “YAG glass–ceramic phosphors for white LED (I): development,” Proc. SPIE 5941, 594111 (2005).
[CrossRef]

Ueda, K.

J. Lu, K. Ueda, H. Yagi, T. Yanagitani, Y. Akiyama, and A. A. Kaminskii, “Neodymium doped yttrium aluminum garnet (Y3Al5O12) nanocrystalline ceramics-a new generation of solid state laser and optical materials,” J. Alloy. Comp. 341(1-2), 220–225 (2002).
[CrossRef]

Yagi, H.

T. Yanagida, H. Takahashi, T. Ito, D. Kasama, T. Enoto, M. Sato, S. Hirakuri, M. Kokubun, K. Makishima, T. Yanagitani, H. Yagi, T. Shigeta, and T. Ito, “Evaluation of properties of YAG (Ce) ceramic scintillators,” IEEE Trans. Nucl. Sci. 52(5), 1836–1841 (2005).
[CrossRef]

J. Lu, K. Ueda, H. Yagi, T. Yanagitani, Y. Akiyama, and A. A. Kaminskii, “Neodymium doped yttrium aluminum garnet (Y3Al5O12) nanocrystalline ceramics-a new generation of solid state laser and optical materials,” J. Alloy. Comp. 341(1-2), 220–225 (2002).
[CrossRef]

Yamada, K.

K. Yamada, Y. Imai, and K. Ishii, “Optical simulation of light source devices composed of blue LEDs and YAG phosphor,” J. Light Visual Environ. 27(2), 70–74 (2003).
[CrossRef]

Yamada, T.

S. Nakamura, M. Senoh, N. Iwasa, S.- Nagahama, T. Yamada, and T. Mukai; “Superbright green InGaN single-quantum-well-structure light-emitting diodes,” Jpn. J. Appl. Phys. 34(Part 2, No. 10B), L1332–L1335 (1995).
[CrossRef]

Yamamoto, S.

S. Tanabe, S. Fujita, A. Sakamoto, and S. Yamamoto, “Glass ceramics for solid-state lighting,” Ceram. Trans. 173, 19–25 (2006).

S. Fujita, S. Yoshihara, A. Sakamoto, S. Yamamoto, and S. Tanabe, “YAG glass–ceramic phosphors for white LED (I): development,” Proc. SPIE 5941, 594111 (2005).
[CrossRef]

Yanagida, T.

T. Yanagida, H. Takahashi, T. Ito, D. Kasama, T. Enoto, M. Sato, S. Hirakuri, M. Kokubun, K. Makishima, T. Yanagitani, H. Yagi, T. Shigeta, and T. Ito, “Evaluation of properties of YAG (Ce) ceramic scintillators,” IEEE Trans. Nucl. Sci. 52(5), 1836–1841 (2005).
[CrossRef]

Yanagitani, T.

T. Yanagida, H. Takahashi, T. Ito, D. Kasama, T. Enoto, M. Sato, S. Hirakuri, M. Kokubun, K. Makishima, T. Yanagitani, H. Yagi, T. Shigeta, and T. Ito, “Evaluation of properties of YAG (Ce) ceramic scintillators,” IEEE Trans. Nucl. Sci. 52(5), 1836–1841 (2005).
[CrossRef]

J. Lu, K. Ueda, H. Yagi, T. Yanagitani, Y. Akiyama, and A. A. Kaminskii, “Neodymium doped yttrium aluminum garnet (Y3Al5O12) nanocrystalline ceramics-a new generation of solid state laser and optical materials,” J. Alloy. Comp. 341(1-2), 220–225 (2002).
[CrossRef]

Yoshihara, S.

S. Fujita, S. Yoshihara, A. Sakamoto, S. Yamamoto, and S. Tanabe, “YAG glass–ceramic phosphors for white LED (I): development,” Proc. SPIE 5941, 594111 (2005).
[CrossRef]

Yoshikawa, A.

W. Zhao, S. Anghel, C. Mancini, D. Amans, G. Boulon, T. Epicier, Y. Shi, X. Q. Feng, Y. B. Pan, V. chani, and A. Yoshikawa, “Ce3+ dopant segregation in Y3Al5O12 optical ceramics,” Opt. Mater. 33(5), 684–687 (2011).
[CrossRef]

Zhang, W.

N. Ganesh, W. Zhang, P. C. Mathias, E. Chow, J. A. N. T. Soares, V. Malyarchuk, A. D. Smith, and B. T. Cunningham, “Enhanced fluorescence emission from quantum dots on a photonic crystal surface,” Nat. Nanotechnol. 2(8), 515–520 (2007).
[CrossRef] [PubMed]

Zhao, W.

W. Zhao, S. Anghel, C. Mancini, D. Amans, G. Boulon, T. Epicier, Y. Shi, X. Q. Feng, Y. B. Pan, V. chani, and A. Yoshikawa, “Ce3+ dopant segregation in Y3Al5O12 optical ceramics,” Opt. Mater. 33(5), 684–687 (2011).
[CrossRef]

Zhu, Y.

N. Narendran, Y. Gu, J. P. Freyssinier-Nova, and Y. Zhu, “Extracting phosphor-scattered photons to improve white LED efficiency,” Phys. Status Solidi A 202(6), R60–R62 (2005).
[CrossRef]

Appl. Phys. Lett.

S. Nakamura, T. Mukai, and M. Senoh, “Candela-class high-brightness InGaN/AlGaN double-heterostructure blue-light-emitting diodes,” Appl. Phys. Lett. 64(13), 1687–1689 (1994).
[CrossRef]

S. Nakamura, M. Senoh, N. Iwasa, and S. Nagahama, “High-power InGaN single-quantum-well-structure blue and violet light-emitting diodes,” Appl. Phys. Lett. 67(13), 1868–1870 (1995).
[CrossRef]

S. L. Jones, D. Kumar, R. K. Singh, and P. H. Holloway, “Luminescence of pulsed laser deposited Eu doped yttrium oxide films,” Appl. Phys. Lett. 71(3), 404–406 (1997).
[CrossRef]

J. Y. Cho, Y. R. Do, and Y.-D. Huh, “Analysis of the factors governing the enhanced photoluminescence brightness of Li-doped Y2O3:Eu thin-film phosphors,” Appl. Phys. Lett. 89(13), 131915 (2006).
[CrossRef]

Y. K. Lee, J. R. Oh, and Y. R. Do, “Enhanced extraction efficiency of Y2O3:Eu3+ thin-film phosphors coated with hexagonally close-packed polystyrene nanosphere monolayers,” Appl. Phys. Lett. 91(4), 041907 (2007).
[CrossRef]

Y. K. Lee, J. R. Oh, Y. R. Do, and Y.-D. Huh, “Strong perturbation of the guided light within Y2O3:Eu3+ thin-film phosphors coated with two-dimensional air-hole photonic crystal arrays,” Appl. Phys. Lett. 91(23), 231908 (2007).
[CrossRef]

Appl. Phys., A Mater. Sci. Process.

P. Schlotter, R. Schmidt, and J. Schneider, “Luminescence conversion of blue light emitting diodes,” Appl. Phys., A Mater. Sci. Process. 64(4), 417–418 (1997).
[CrossRef]

Appl. Surf. Sci.

R. K. Singh, Z. Chen, D. Kumar, K. Cho, and M. Ollinger, “Critical issues in enhancing brightness in thin film phosphors for flat-panel display applications,” Appl. Surf. Sci. 197-198, 321–324 (2002).
[CrossRef]

Ceram. Trans.

S. Tanabe, S. Fujita, A. Sakamoto, and S. Yamamoto, “Glass ceramics for solid-state lighting,” Ceram. Trans. 173, 19–25 (2006).

Electrochem. Solid-State Lett.

J. R. Oh, H. K. Park, and Y. R. Do, “Brighter photoluminescence of 2D photonic crystal-assisted Y2O3:Eu3+ thick-film phosphors over screened powder phosphors,” Electrochem. Solid-State Lett. 12(6), J58–J60 (2009).
[CrossRef]

IEEE J. Sel. Top. Quantum Electron.

S. Fujita, A. Sakamoto, and S. Tanabe, “Luminescence characteristics of YAG glass-ceramic phosphor for white LED,” IEEE J. Sel. Top. Quantum Electron. 14(5), 1387–1391 (2008).
[CrossRef]

IEEE Trans. Nucl. Sci.

T. Yanagida, H. Takahashi, T. Ito, D. Kasama, T. Enoto, M. Sato, S. Hirakuri, M. Kokubun, K. Makishima, T. Yanagitani, H. Yagi, T. Shigeta, and T. Ito, “Evaluation of properties of YAG (Ce) ceramic scintillators,” IEEE Trans. Nucl. Sci. 52(5), 1836–1841 (2005).
[CrossRef]

J. Alloy. Comp.

J. Lu, K. Ueda, H. Yagi, T. Yanagitani, Y. Akiyama, and A. A. Kaminskii, “Neodymium doped yttrium aluminum garnet (Y3Al5O12) nanocrystalline ceramics-a new generation of solid state laser and optical materials,” J. Alloy. Comp. 341(1-2), 220–225 (2002).
[CrossRef]

J. Appl. Phys.

J. R. Oh, Y. K. Lee, H. K. Park, and Y. R. Do, “Effects of symmetry, shape, and structural parameters of two-dimensional SiNx photonic crystal on the extracted light from Y2O3:Eu3+ film,” J. Appl. Phys. 105(4), 043103 (2009).
[CrossRef]

J. Light Visual Environ.

K. Yamada, Y. Imai, and K. Ishii, “Optical simulation of light source devices composed of blue LEDs and YAG phosphor,” J. Light Visual Environ. 27(2), 70–74 (2003).
[CrossRef]

J. Mater. Chem.

J. R. Oh, J. H. Moon, H. K. Park, J. H. Park, H. Chung, J. Jeong, W. Kim, and Y. R. Do, “Wafer-scale colloidal lithography based on self-assembly of polystyrene nanospheres and atomic layer deposition,” J. Mater. Chem. 20(24), 5025–5029 (2010).
[CrossRef]

J. Phys. Chem. C

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Figures (7)

Fig. 1
Fig. 1

(a) Optical transmission spectra, (b) XRD pattern, (c) Two-dimensional AFM image, (d) Side and top view FE-SEM images of an ideally smooth YAG:Ce CPP.

Fig. 2
Fig. 2

(a) Cross-sectional view FE-SEM images of a YAG:Ce CPP coated with a 2D PCL nanohole arrays. The magnified FE-SEM images of a 2D PCL of the locations marked by the circle at a point of a YAG:Ce CPP coated with a 2D SiNx PCL nanoholes.

Fig. 3
Fig. 3

(a) Enhancement ratio of the integrated PL intensities as a function of the lattice constant of the 2D SiNx nanohole PCL-assisted YAG:Ce CPPs. (b) The integrated PL emission spectra of a conventional YAG:Ce CPP and the 2D SiNx PCL-assisted YAG:Ce CPPs with four lattice constants (350, 420, 580, and 720 nm) on top of a blue LED cup under 445nm LED excitation.

Fig. 4
Fig. 4

Schematic diagrams of (a) a conventional YAG:Ce CPP-capped LED and (b) a 2D SiNx PCL-assisted YAG:Ce CPP-capped LED.

Fig. 5
Fig. 5

The blue-conversion-white EL spectra of a conventional YAG:Ce CPP-capped LED and a 2D SiNx PCL-assisted YAG:Ce CPP-capped LED.

Fig. 6
Fig. 6

(a) Luminous efficacy (lm/W) and (b) correlated color temperature (CCT) of a conventional YAG:Ce CPP-capped LED and a 2D SiNx PCL-assisted YAG:Ce CPP-capped LED as a function of the applied current. (c) The normalized luminous efficacy and (d) CCT of a conventional YAG:Ce CPP-capped LED and a 2D SiNx PCL-assisted YAG:Ce CPP-capped LED as a function of the ambient temperature.

Fig. 7
Fig. 7

(a) The normalized lumens and (b) CCT as a function of the viewing angle for a conventional YAG:Ce CPP-capped LED and a 2D SiNx PCL-assisted YAG:Ce CPP-capped LED taken under identical excitation conditions (current at 350 mA).

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