Abstract

We synthesized Er3+-Yb3+, Pr3+-Yb3+, and Er3+-Pr3+-Yb3+-doped oxyfluoride glass ceramics containing CaF2 nanocrystals by proper thermal treatments. Spectral characteristics of down- and up-converted emissions in three kinds of glass ceramics under 365-nm and 980-nm excitations were compared and explained by cross relaxations, excited-state absorptions, and energy-transfer processes between different ions. The huge reduction of up-conversion emission in the triply doped glass ceramics under 980-nm excitation compared to the Er3+-Yb3+ codoped one was explained by the split pump power and the direct energy transfer from Er3+ to Pr3+ ions. Increasing Yb3+ concentration from 2% to 10% in the triply doped glass ceramics showed more than quadratic enhancement of the absorbed power, and we explained it by the enhanced energy-transfer efficiency from Yb3+ to Er3+ ions. We also observed enhanced up-converted emissions of Er3+ and Pr3+ ions in three kinds of glass ceramics under simultaneous excitation at 980 nm and 1550 nm, and suggested detailed up-conversion mechanisms.

© 2016 Optical Society of Korea

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  1. F. Wang, D. Banerjee, Y. Liu, X. Chen, and X. Liu, “Upconversion nanoparticles in biological labeling, imaging, and therapy,” Analyst 135, 1839-1854 (2010).
    [Crossref]
  2. T. R. Hinklin, S. C. Rand, and R. M. Laine, “Transparent, polycrystalline upconverting nanoceramics: towards 3-D displays,” Adv. Mater. 20, 1-4 (2008).
    [Crossref]
  3. S. Ivanova1 and F. Pellé, “Evaluating upconversion materials developed to improve the efficiency of solar cells: reply to comment,” J. Opt. Soc. Am. B 27, 1356-1358 (2010).
    [Crossref]
  4. Y. Wang and J. Ohwaki, “New transparent vitroceramics codoped with Er3+ and Yb3+ for efficient frequency upconversion,” Appl. Phys. Lett. 63, 3268-3270 (1993).
    [Crossref]
  5. A. J. Stevenson, H. S.-Brault, P. Gredin, and M. Mortier, “Fluoride materials for optical applications: single crystals, ceramics, glasses, and glass-ceramics,” J. Fluorine Chem. 132, 1165-1173 (2011).
    [Crossref]
  6. X. Qiao, X. Fan, J. Wang, and M. Wang, “Luminescence behavior of Er3+ ions in glass-ceramics containing CaF2 nanocrystals,” J. Non-Cryst. Solids 351, 357-363 (2005).
    [Crossref]
  7. J. P. Srivastava and R. D. Singh, “Infrared lattice vibrational spectrum of CaF2,” J. Phys. C: Solid State Phys. 4, L47-49 (1971).
    [Crossref]
  8. X. Zhang, X. Wang, Y. Qiao, and H. Guo, “Synthesis and photoluminescent properties of Gd3O4Br:Er3+ phosphors prepared by solid-state reaction method,” Opt. Mater. 32, 216-220 (2009).
    [Crossref]
  9. G. Chen, G. Somesfalean, Y. Liu, Z. Zhang, and Q. Sun, F. Wang, “Upconversion mechanism for two-color emission in rare-earth-ion-doped ZrO2 nanocrystals,” Phy. Rev. B 75, 195204 (2007).
  10. C. Ming, F. Song, and L. Yan, “Spectroscopic study and green upconversion of Pr3+/Yb3+-codoped NaY(WO4)2 crystal,” Opt. Commun. 286, 217-220 (2013).
    [Crossref]
  11. Y. Dwivedi, A. Rai, and S. B. Rai, “Intense white upconversion emission in Pr/Er/Yb codoped tellurite glass,” J. Appl. Phys. 104, 043509 (2008)
  12. H. P. Klug and L. E. Alexander, X-ray Diffraction Procedures, 2nd ed. (Wiley, New York, USA, 1974).
  13. J. Tua, S. A. FitzGeralda, J. A. Campbellb, and A. J. Sievers, “Glass-like properties observed in low-frequency Raman scattering of mixed fluorite crystals,” J. Non-Cryst. Solids 203, 153-158 (1996).
    [Crossref]
  14. S. A. Song, D. S. Kim, H. M. Jeong, and K. S. Lim, “Upconversion in Nd-Tm-Yb triply doped oxyfluoride glass-ceramics containing CaF2 nanocrystals,” J. Lumin. 152, 75-78 (2014).
    [Crossref]
  15. W. J. Park, C. Liu, and J. Heo, “Direct imaging of the distribution of Nd3+ ions in glasses containing PbS quantum dots,” J. Am. Ceram. Soc. 98, 2074-2077 (2015).
    [Crossref]
  16. M. Rozanski, K. Wisniewski, J. Szatkowski, C. Koepke, M. Sroda, “Effect of thermal treatment on excited state spectroscopy of oxyfluoride borosilicate glass activated by Pr3+ ions,” Opt. Mater. 31, 548-553 (2009).
    [Crossref]
  17. A. Lupei, V. Lupei, C. Gheorghe, and A. Ikesue, “Excited states dynamics of Er3+ in Sc2O3 ceramic,” J. Lumin. 128, 918-920 (2008).
    [Crossref]
  18. S. H. Park, D. C. Lee, J. Heo, and D. W. Shin, “Energy transfer between Er3+ and Pr3+ in chalcogenide glasses for dual-wavelength fiber-optic amplifiers,” J. Appl. Phys. 91, 9072-9077 (2002).
    [Crossref]
  19. Gongxun Bai, J. D., Lili Tao, Kefeng Li, Lili Hu, Yuen H. Tsang, “Efficient 2.7 micron emission from Er3+/Pr3+ codoped oxyfluorotellurite glass,” J. Non-Cryst. Solids 358, 3403-3406 (2012).
    [Crossref]
  20. D. J. Coleman, P. Golding, and T. A. King, “Spectroscopic and energy-transfer parameters for Er3+-doped and Er3+, Pr3+-codoped GeGaS glasses,” J. Opt. Soc. Am. 19, 1982-1989 (2002).
    [Crossref]
  21. F. Zhang, Z. Bi, A. Huang, and Z. Xiao, “Visible luminescence properties of Er3+/ Pr3+ codoped fluorotellurite glasses,” Opt. Mater. 41, 112-115 (2015).
    [Crossref]
  22. M. P. Hehlen, N. J. Cockroft, T. R. Gosnell, and A. J. Bruce, “Spectroscopic properties of Er3+ and Yb3+ doped soda-lime silicate and aluminosilicate glasses, Phys. Rev. B 56, 9302-9318 (1997).
    [Crossref]
  23. Z. Hu, Y. Wang, E. Ma, D. Chen, and F. Bao, “Microstructures and upconversion luminescence of Er3+ doped and Er3+/Yb3+ co-doped oxyfluoride glass ceramics,” Mater. Chem. Phys. 101, 234-237 (2007).
    [Crossref]
  24. T. Wang, J. Zhou, S. Shi, B. Li, and R. Zong, “Preparation of size-controlled nanocrystalline infrared-to-visible upconverting phosphors Gd2O3: Yb, Er by using a water-in-oil microemulsion system,” J. Electroceram. 21, 765-769 (2008).
    [Crossref]
  25. W. Lu, L. Cheng, H. Zhong, J. Sun, J. Wan, Y. Tian, and B. Chen, “Dependence of upconversion emission intensity on Yb3+ concentration in Er3+/Yb3+ co-doped flake shaped Y2(MoO4)3 phosphors,” J. Phys. D: Appl. Phys. 43, 085404 (2010).
  26. R. S. Yadav, R. K. Verma, A. Bahadur, S. B. Rai, “Structural characterizations and intense green upconversion emission in Yb3+, Pr3+ co-doped Y2O3 nano-phosphor,” Spectrochim. Acta Part A 137, 357-362 (2015).
    [Crossref]
  27. S. Q. Man, H. L. Zhang, Y. L. Liu, J. X. Meng, E. Y. B. Pun, and P. S. Chung, “Energy transfer in Pr3+/Yb3+ codoped tellurite glasses,” Opt. Mater. 30, 334-337 (2007).
    [Crossref]
  28. J. Cai, X. Wei, F. Hu, Z. Cao, L. Zhao, Y. Chen, C. Duan, and M. Yin, “Up-conversion luminescence and optical thermometry properties of transparent glassceramics containing CaF2:Yb/Er nanocrystals,” Ceram. Int. 42, 13990-13995 (2016).
    [Crossref]
  29. S. Haas, A. Hoell, R. Wurth, C. Rüsel, P. Boesecke, and U. Vainio, “Analysis of nanostructure and nanochemistry by ASAXS: Accessing phase composition of oxyfluoride glass ceramics doped with Er3+/Yb3+,” Phys. Rev. B 81, 184207 (2010).
  30. Y. C. Suling, Zhao, Zhiqin Liang, Meng Han, Zheng Xu, “Optimized upconversion emission of NaLuF4:Er,Yb nanocrystals codoped with Gd3+ ions and its mechanism,” J. Alloys Comp. 593, 30-33 (2014).
    [Crossref]
  31. Z. Liu, B. Mei, J. Song, and W. Li, “Fabrication and optical characterizations of Yb, Er codoped CaF2 transparent ceramic,” J. Eur. Ceram. Soc. 34, 4389-4394 (2014).
    [Crossref]
  32. L. A. Diaz-Torres, O. Meza, D. Solis, P. Salas, and E. D. Rosa, “Visible upconversion emission and non-radiative direct Yb3+ to Er3+ energy transfer processes in nanocrystalline ZrO2:Yb3+, Er3+,” Opt. Laser. Eng. 49, 703-708 (2011).
    [Crossref]

2016 (1)

J. Cai, X. Wei, F. Hu, Z. Cao, L. Zhao, Y. Chen, C. Duan, and M. Yin, “Up-conversion luminescence and optical thermometry properties of transparent glassceramics containing CaF2:Yb/Er nanocrystals,” Ceram. Int. 42, 13990-13995 (2016).
[Crossref]

2015 (3)

F. Zhang, Z. Bi, A. Huang, and Z. Xiao, “Visible luminescence properties of Er3+/ Pr3+ codoped fluorotellurite glasses,” Opt. Mater. 41, 112-115 (2015).
[Crossref]

R. S. Yadav, R. K. Verma, A. Bahadur, S. B. Rai, “Structural characterizations and intense green upconversion emission in Yb3+, Pr3+ co-doped Y2O3 nano-phosphor,” Spectrochim. Acta Part A 137, 357-362 (2015).
[Crossref]

W. J. Park, C. Liu, and J. Heo, “Direct imaging of the distribution of Nd3+ ions in glasses containing PbS quantum dots,” J. Am. Ceram. Soc. 98, 2074-2077 (2015).
[Crossref]

2014 (3)

S. A. Song, D. S. Kim, H. M. Jeong, and K. S. Lim, “Upconversion in Nd-Tm-Yb triply doped oxyfluoride glass-ceramics containing CaF2 nanocrystals,” J. Lumin. 152, 75-78 (2014).
[Crossref]

Y. C. Suling, Zhao, Zhiqin Liang, Meng Han, Zheng Xu, “Optimized upconversion emission of NaLuF4:Er,Yb nanocrystals codoped with Gd3+ ions and its mechanism,” J. Alloys Comp. 593, 30-33 (2014).
[Crossref]

Z. Liu, B. Mei, J. Song, and W. Li, “Fabrication and optical characterizations of Yb, Er codoped CaF2 transparent ceramic,” J. Eur. Ceram. Soc. 34, 4389-4394 (2014).
[Crossref]

2013 (1)

C. Ming, F. Song, and L. Yan, “Spectroscopic study and green upconversion of Pr3+/Yb3+-codoped NaY(WO4)2 crystal,” Opt. Commun. 286, 217-220 (2013).
[Crossref]

2012 (1)

Gongxun Bai, J. D., Lili Tao, Kefeng Li, Lili Hu, Yuen H. Tsang, “Efficient 2.7 micron emission from Er3+/Pr3+ codoped oxyfluorotellurite glass,” J. Non-Cryst. Solids 358, 3403-3406 (2012).
[Crossref]

2011 (2)

A. J. Stevenson, H. S.-Brault, P. Gredin, and M. Mortier, “Fluoride materials for optical applications: single crystals, ceramics, glasses, and glass-ceramics,” J. Fluorine Chem. 132, 1165-1173 (2011).
[Crossref]

L. A. Diaz-Torres, O. Meza, D. Solis, P. Salas, and E. D. Rosa, “Visible upconversion emission and non-radiative direct Yb3+ to Er3+ energy transfer processes in nanocrystalline ZrO2:Yb3+, Er3+,” Opt. Laser. Eng. 49, 703-708 (2011).
[Crossref]

2010 (4)

S. Haas, A. Hoell, R. Wurth, C. Rüsel, P. Boesecke, and U. Vainio, “Analysis of nanostructure and nanochemistry by ASAXS: Accessing phase composition of oxyfluoride glass ceramics doped with Er3+/Yb3+,” Phys. Rev. B 81, 184207 (2010).

W. Lu, L. Cheng, H. Zhong, J. Sun, J. Wan, Y. Tian, and B. Chen, “Dependence of upconversion emission intensity on Yb3+ concentration in Er3+/Yb3+ co-doped flake shaped Y2(MoO4)3 phosphors,” J. Phys. D: Appl. Phys. 43, 085404 (2010).

F. Wang, D. Banerjee, Y. Liu, X. Chen, and X. Liu, “Upconversion nanoparticles in biological labeling, imaging, and therapy,” Analyst 135, 1839-1854 (2010).
[Crossref]

S. Ivanova1 and F. Pellé, “Evaluating upconversion materials developed to improve the efficiency of solar cells: reply to comment,” J. Opt. Soc. Am. B 27, 1356-1358 (2010).
[Crossref]

2009 (2)

X. Zhang, X. Wang, Y. Qiao, and H. Guo, “Synthesis and photoluminescent properties of Gd3O4Br:Er3+ phosphors prepared by solid-state reaction method,” Opt. Mater. 32, 216-220 (2009).
[Crossref]

M. Rozanski, K. Wisniewski, J. Szatkowski, C. Koepke, M. Sroda, “Effect of thermal treatment on excited state spectroscopy of oxyfluoride borosilicate glass activated by Pr3+ ions,” Opt. Mater. 31, 548-553 (2009).
[Crossref]

2008 (4)

A. Lupei, V. Lupei, C. Gheorghe, and A. Ikesue, “Excited states dynamics of Er3+ in Sc2O3 ceramic,” J. Lumin. 128, 918-920 (2008).
[Crossref]

Y. Dwivedi, A. Rai, and S. B. Rai, “Intense white upconversion emission in Pr/Er/Yb codoped tellurite glass,” J. Appl. Phys. 104, 043509 (2008)

T. R. Hinklin, S. C. Rand, and R. M. Laine, “Transparent, polycrystalline upconverting nanoceramics: towards 3-D displays,” Adv. Mater. 20, 1-4 (2008).
[Crossref]

T. Wang, J. Zhou, S. Shi, B. Li, and R. Zong, “Preparation of size-controlled nanocrystalline infrared-to-visible upconverting phosphors Gd2O3: Yb, Er by using a water-in-oil microemulsion system,” J. Electroceram. 21, 765-769 (2008).
[Crossref]

2007 (3)

S. Q. Man, H. L. Zhang, Y. L. Liu, J. X. Meng, E. Y. B. Pun, and P. S. Chung, “Energy transfer in Pr3+/Yb3+ codoped tellurite glasses,” Opt. Mater. 30, 334-337 (2007).
[Crossref]

Z. Hu, Y. Wang, E. Ma, D. Chen, and F. Bao, “Microstructures and upconversion luminescence of Er3+ doped and Er3+/Yb3+ co-doped oxyfluoride glass ceramics,” Mater. Chem. Phys. 101, 234-237 (2007).
[Crossref]

G. Chen, G. Somesfalean, Y. Liu, Z. Zhang, and Q. Sun, F. Wang, “Upconversion mechanism for two-color emission in rare-earth-ion-doped ZrO2 nanocrystals,” Phy. Rev. B 75, 195204 (2007).

2005 (1)

X. Qiao, X. Fan, J. Wang, and M. Wang, “Luminescence behavior of Er3+ ions in glass-ceramics containing CaF2 nanocrystals,” J. Non-Cryst. Solids 351, 357-363 (2005).
[Crossref]

2002 (2)

D. J. Coleman, P. Golding, and T. A. King, “Spectroscopic and energy-transfer parameters for Er3+-doped and Er3+, Pr3+-codoped GeGaS glasses,” J. Opt. Soc. Am. 19, 1982-1989 (2002).
[Crossref]

S. H. Park, D. C. Lee, J. Heo, and D. W. Shin, “Energy transfer between Er3+ and Pr3+ in chalcogenide glasses for dual-wavelength fiber-optic amplifiers,” J. Appl. Phys. 91, 9072-9077 (2002).
[Crossref]

1997 (1)

M. P. Hehlen, N. J. Cockroft, T. R. Gosnell, and A. J. Bruce, “Spectroscopic properties of Er3+ and Yb3+ doped soda-lime silicate and aluminosilicate glasses, Phys. Rev. B 56, 9302-9318 (1997).
[Crossref]

1996 (1)

J. Tua, S. A. FitzGeralda, J. A. Campbellb, and A. J. Sievers, “Glass-like properties observed in low-frequency Raman scattering of mixed fluorite crystals,” J. Non-Cryst. Solids 203, 153-158 (1996).
[Crossref]

1993 (1)

Y. Wang and J. Ohwaki, “New transparent vitroceramics codoped with Er3+ and Yb3+ for efficient frequency upconversion,” Appl. Phys. Lett. 63, 3268-3270 (1993).
[Crossref]

1971 (1)

J. P. Srivastava and R. D. Singh, “Infrared lattice vibrational spectrum of CaF2,” J. Phys. C: Solid State Phys. 4, L47-49 (1971).
[Crossref]

Alexander, L. E.

H. P. Klug and L. E. Alexander, X-ray Diffraction Procedures, 2nd ed. (Wiley, New York, USA, 1974).

Bahadur, A.

R. S. Yadav, R. K. Verma, A. Bahadur, S. B. Rai, “Structural characterizations and intense green upconversion emission in Yb3+, Pr3+ co-doped Y2O3 nano-phosphor,” Spectrochim. Acta Part A 137, 357-362 (2015).
[Crossref]

Bai, Gongxun

Gongxun Bai, J. D., Lili Tao, Kefeng Li, Lili Hu, Yuen H. Tsang, “Efficient 2.7 micron emission from Er3+/Pr3+ codoped oxyfluorotellurite glass,” J. Non-Cryst. Solids 358, 3403-3406 (2012).
[Crossref]

Banerjee, D.

F. Wang, D. Banerjee, Y. Liu, X. Chen, and X. Liu, “Upconversion nanoparticles in biological labeling, imaging, and therapy,” Analyst 135, 1839-1854 (2010).
[Crossref]

Bao, F.

Z. Hu, Y. Wang, E. Ma, D. Chen, and F. Bao, “Microstructures and upconversion luminescence of Er3+ doped and Er3+/Yb3+ co-doped oxyfluoride glass ceramics,” Mater. Chem. Phys. 101, 234-237 (2007).
[Crossref]

Bi, Z.

F. Zhang, Z. Bi, A. Huang, and Z. Xiao, “Visible luminescence properties of Er3+/ Pr3+ codoped fluorotellurite glasses,” Opt. Mater. 41, 112-115 (2015).
[Crossref]

Boesecke, P.

S. Haas, A. Hoell, R. Wurth, C. Rüsel, P. Boesecke, and U. Vainio, “Analysis of nanostructure and nanochemistry by ASAXS: Accessing phase composition of oxyfluoride glass ceramics doped with Er3+/Yb3+,” Phys. Rev. B 81, 184207 (2010).

-Brault, H. S.

A. J. Stevenson, H. S.-Brault, P. Gredin, and M. Mortier, “Fluoride materials for optical applications: single crystals, ceramics, glasses, and glass-ceramics,” J. Fluorine Chem. 132, 1165-1173 (2011).
[Crossref]

Bruce, A. J.

M. P. Hehlen, N. J. Cockroft, T. R. Gosnell, and A. J. Bruce, “Spectroscopic properties of Er3+ and Yb3+ doped soda-lime silicate and aluminosilicate glasses, Phys. Rev. B 56, 9302-9318 (1997).
[Crossref]

C., Y.

Y. C. Suling, Zhao, Zhiqin Liang, Meng Han, Zheng Xu, “Optimized upconversion emission of NaLuF4:Er,Yb nanocrystals codoped with Gd3+ ions and its mechanism,” J. Alloys Comp. 593, 30-33 (2014).
[Crossref]

Cai, J.

J. Cai, X. Wei, F. Hu, Z. Cao, L. Zhao, Y. Chen, C. Duan, and M. Yin, “Up-conversion luminescence and optical thermometry properties of transparent glassceramics containing CaF2:Yb/Er nanocrystals,” Ceram. Int. 42, 13990-13995 (2016).
[Crossref]

Campbellb, J. A.

J. Tua, S. A. FitzGeralda, J. A. Campbellb, and A. J. Sievers, “Glass-like properties observed in low-frequency Raman scattering of mixed fluorite crystals,” J. Non-Cryst. Solids 203, 153-158 (1996).
[Crossref]

Cao, Z.

J. Cai, X. Wei, F. Hu, Z. Cao, L. Zhao, Y. Chen, C. Duan, and M. Yin, “Up-conversion luminescence and optical thermometry properties of transparent glassceramics containing CaF2:Yb/Er nanocrystals,” Ceram. Int. 42, 13990-13995 (2016).
[Crossref]

Chen, B.

W. Lu, L. Cheng, H. Zhong, J. Sun, J. Wan, Y. Tian, and B. Chen, “Dependence of upconversion emission intensity on Yb3+ concentration in Er3+/Yb3+ co-doped flake shaped Y2(MoO4)3 phosphors,” J. Phys. D: Appl. Phys. 43, 085404 (2010).

Chen, D.

Z. Hu, Y. Wang, E. Ma, D. Chen, and F. Bao, “Microstructures and upconversion luminescence of Er3+ doped and Er3+/Yb3+ co-doped oxyfluoride glass ceramics,” Mater. Chem. Phys. 101, 234-237 (2007).
[Crossref]

Chen, G.

G. Chen, G. Somesfalean, Y. Liu, Z. Zhang, and Q. Sun, F. Wang, “Upconversion mechanism for two-color emission in rare-earth-ion-doped ZrO2 nanocrystals,” Phy. Rev. B 75, 195204 (2007).

Chen, X.

F. Wang, D. Banerjee, Y. Liu, X. Chen, and X. Liu, “Upconversion nanoparticles in biological labeling, imaging, and therapy,” Analyst 135, 1839-1854 (2010).
[Crossref]

Chen, Y.

J. Cai, X. Wei, F. Hu, Z. Cao, L. Zhao, Y. Chen, C. Duan, and M. Yin, “Up-conversion luminescence and optical thermometry properties of transparent glassceramics containing CaF2:Yb/Er nanocrystals,” Ceram. Int. 42, 13990-13995 (2016).
[Crossref]

Cheng, L.

W. Lu, L. Cheng, H. Zhong, J. Sun, J. Wan, Y. Tian, and B. Chen, “Dependence of upconversion emission intensity on Yb3+ concentration in Er3+/Yb3+ co-doped flake shaped Y2(MoO4)3 phosphors,” J. Phys. D: Appl. Phys. 43, 085404 (2010).

Chung, P. S.

S. Q. Man, H. L. Zhang, Y. L. Liu, J. X. Meng, E. Y. B. Pun, and P. S. Chung, “Energy transfer in Pr3+/Yb3+ codoped tellurite glasses,” Opt. Mater. 30, 334-337 (2007).
[Crossref]

Cockroft, N. J.

M. P. Hehlen, N. J. Cockroft, T. R. Gosnell, and A. J. Bruce, “Spectroscopic properties of Er3+ and Yb3+ doped soda-lime silicate and aluminosilicate glasses, Phys. Rev. B 56, 9302-9318 (1997).
[Crossref]

Coleman, D. J.

D. J. Coleman, P. Golding, and T. A. King, “Spectroscopic and energy-transfer parameters for Er3+-doped and Er3+, Pr3+-codoped GeGaS glasses,” J. Opt. Soc. Am. 19, 1982-1989 (2002).
[Crossref]

Diaz-Torres, L. A.

L. A. Diaz-Torres, O. Meza, D. Solis, P. Salas, and E. D. Rosa, “Visible upconversion emission and non-radiative direct Yb3+ to Er3+ energy transfer processes in nanocrystalline ZrO2:Yb3+, Er3+,” Opt. Laser. Eng. 49, 703-708 (2011).
[Crossref]

Duan, C.

J. Cai, X. Wei, F. Hu, Z. Cao, L. Zhao, Y. Chen, C. Duan, and M. Yin, “Up-conversion luminescence and optical thermometry properties of transparent glassceramics containing CaF2:Yb/Er nanocrystals,” Ceram. Int. 42, 13990-13995 (2016).
[Crossref]

Dwivedi, Y.

Y. Dwivedi, A. Rai, and S. B. Rai, “Intense white upconversion emission in Pr/Er/Yb codoped tellurite glass,” J. Appl. Phys. 104, 043509 (2008)

Fan, X.

X. Qiao, X. Fan, J. Wang, and M. Wang, “Luminescence behavior of Er3+ ions in glass-ceramics containing CaF2 nanocrystals,” J. Non-Cryst. Solids 351, 357-363 (2005).
[Crossref]

FitzGeralda, S. A.

J. Tua, S. A. FitzGeralda, J. A. Campbellb, and A. J. Sievers, “Glass-like properties observed in low-frequency Raman scattering of mixed fluorite crystals,” J. Non-Cryst. Solids 203, 153-158 (1996).
[Crossref]

Gheorghe, C.

A. Lupei, V. Lupei, C. Gheorghe, and A. Ikesue, “Excited states dynamics of Er3+ in Sc2O3 ceramic,” J. Lumin. 128, 918-920 (2008).
[Crossref]

Golding, P.

D. J. Coleman, P. Golding, and T. A. King, “Spectroscopic and energy-transfer parameters for Er3+-doped and Er3+, Pr3+-codoped GeGaS glasses,” J. Opt. Soc. Am. 19, 1982-1989 (2002).
[Crossref]

Gosnell, T. R.

M. P. Hehlen, N. J. Cockroft, T. R. Gosnell, and A. J. Bruce, “Spectroscopic properties of Er3+ and Yb3+ doped soda-lime silicate and aluminosilicate glasses, Phys. Rev. B 56, 9302-9318 (1997).
[Crossref]

Gredin, P.

A. J. Stevenson, H. S.-Brault, P. Gredin, and M. Mortier, “Fluoride materials for optical applications: single crystals, ceramics, glasses, and glass-ceramics,” J. Fluorine Chem. 132, 1165-1173 (2011).
[Crossref]

Guo, H.

X. Zhang, X. Wang, Y. Qiao, and H. Guo, “Synthesis and photoluminescent properties of Gd3O4Br:Er3+ phosphors prepared by solid-state reaction method,” Opt. Mater. 32, 216-220 (2009).
[Crossref]

Haas, S.

S. Haas, A. Hoell, R. Wurth, C. Rüsel, P. Boesecke, and U. Vainio, “Analysis of nanostructure and nanochemistry by ASAXS: Accessing phase composition of oxyfluoride glass ceramics doped with Er3+/Yb3+,” Phys. Rev. B 81, 184207 (2010).

Han, Meng

Y. C. Suling, Zhao, Zhiqin Liang, Meng Han, Zheng Xu, “Optimized upconversion emission of NaLuF4:Er,Yb nanocrystals codoped with Gd3+ ions and its mechanism,” J. Alloys Comp. 593, 30-33 (2014).
[Crossref]

Hehlen, M. P.

M. P. Hehlen, N. J. Cockroft, T. R. Gosnell, and A. J. Bruce, “Spectroscopic properties of Er3+ and Yb3+ doped soda-lime silicate and aluminosilicate glasses, Phys. Rev. B 56, 9302-9318 (1997).
[Crossref]

Heo, J.

W. J. Park, C. Liu, and J. Heo, “Direct imaging of the distribution of Nd3+ ions in glasses containing PbS quantum dots,” J. Am. Ceram. Soc. 98, 2074-2077 (2015).
[Crossref]

S. H. Park, D. C. Lee, J. Heo, and D. W. Shin, “Energy transfer between Er3+ and Pr3+ in chalcogenide glasses for dual-wavelength fiber-optic amplifiers,” J. Appl. Phys. 91, 9072-9077 (2002).
[Crossref]

Hinklin, T. R.

T. R. Hinklin, S. C. Rand, and R. M. Laine, “Transparent, polycrystalline upconverting nanoceramics: towards 3-D displays,” Adv. Mater. 20, 1-4 (2008).
[Crossref]

Hoell, A.

S. Haas, A. Hoell, R. Wurth, C. Rüsel, P. Boesecke, and U. Vainio, “Analysis of nanostructure and nanochemistry by ASAXS: Accessing phase composition of oxyfluoride glass ceramics doped with Er3+/Yb3+,” Phys. Rev. B 81, 184207 (2010).

Hu, F.

J. Cai, X. Wei, F. Hu, Z. Cao, L. Zhao, Y. Chen, C. Duan, and M. Yin, “Up-conversion luminescence and optical thermometry properties of transparent glassceramics containing CaF2:Yb/Er nanocrystals,” Ceram. Int. 42, 13990-13995 (2016).
[Crossref]

Hu, Lili

Gongxun Bai, J. D., Lili Tao, Kefeng Li, Lili Hu, Yuen H. Tsang, “Efficient 2.7 micron emission from Er3+/Pr3+ codoped oxyfluorotellurite glass,” J. Non-Cryst. Solids 358, 3403-3406 (2012).
[Crossref]

Hu, Z.

Z. Hu, Y. Wang, E. Ma, D. Chen, and F. Bao, “Microstructures and upconversion luminescence of Er3+ doped and Er3+/Yb3+ co-doped oxyfluoride glass ceramics,” Mater. Chem. Phys. 101, 234-237 (2007).
[Crossref]

Huang, A.

F. Zhang, Z. Bi, A. Huang, and Z. Xiao, “Visible luminescence properties of Er3+/ Pr3+ codoped fluorotellurite glasses,” Opt. Mater. 41, 112-115 (2015).
[Crossref]

Ikesue, A.

A. Lupei, V. Lupei, C. Gheorghe, and A. Ikesue, “Excited states dynamics of Er3+ in Sc2O3 ceramic,” J. Lumin. 128, 918-920 (2008).
[Crossref]

Ivanova1, S.

Jeong, H. M.

S. A. Song, D. S. Kim, H. M. Jeong, and K. S. Lim, “Upconversion in Nd-Tm-Yb triply doped oxyfluoride glass-ceramics containing CaF2 nanocrystals,” J. Lumin. 152, 75-78 (2014).
[Crossref]

Kim, D. S.

S. A. Song, D. S. Kim, H. M. Jeong, and K. S. Lim, “Upconversion in Nd-Tm-Yb triply doped oxyfluoride glass-ceramics containing CaF2 nanocrystals,” J. Lumin. 152, 75-78 (2014).
[Crossref]

King, T. A.

D. J. Coleman, P. Golding, and T. A. King, “Spectroscopic and energy-transfer parameters for Er3+-doped and Er3+, Pr3+-codoped GeGaS glasses,” J. Opt. Soc. Am. 19, 1982-1989 (2002).
[Crossref]

Klug, H. P.

H. P. Klug and L. E. Alexander, X-ray Diffraction Procedures, 2nd ed. (Wiley, New York, USA, 1974).

Koepke, C.

M. Rozanski, K. Wisniewski, J. Szatkowski, C. Koepke, M. Sroda, “Effect of thermal treatment on excited state spectroscopy of oxyfluoride borosilicate glass activated by Pr3+ ions,” Opt. Mater. 31, 548-553 (2009).
[Crossref]

Laine, R. M.

T. R. Hinklin, S. C. Rand, and R. M. Laine, “Transparent, polycrystalline upconverting nanoceramics: towards 3-D displays,” Adv. Mater. 20, 1-4 (2008).
[Crossref]

Lee, D. C.

S. H. Park, D. C. Lee, J. Heo, and D. W. Shin, “Energy transfer between Er3+ and Pr3+ in chalcogenide glasses for dual-wavelength fiber-optic amplifiers,” J. Appl. Phys. 91, 9072-9077 (2002).
[Crossref]

Li, B.

T. Wang, J. Zhou, S. Shi, B. Li, and R. Zong, “Preparation of size-controlled nanocrystalline infrared-to-visible upconverting phosphors Gd2O3: Yb, Er by using a water-in-oil microemulsion system,” J. Electroceram. 21, 765-769 (2008).
[Crossref]

Li, Kefeng

Gongxun Bai, J. D., Lili Tao, Kefeng Li, Lili Hu, Yuen H. Tsang, “Efficient 2.7 micron emission from Er3+/Pr3+ codoped oxyfluorotellurite glass,” J. Non-Cryst. Solids 358, 3403-3406 (2012).
[Crossref]

Li, W.

Z. Liu, B. Mei, J. Song, and W. Li, “Fabrication and optical characterizations of Yb, Er codoped CaF2 transparent ceramic,” J. Eur. Ceram. Soc. 34, 4389-4394 (2014).
[Crossref]

Liang, Zhiqin

Y. C. Suling, Zhao, Zhiqin Liang, Meng Han, Zheng Xu, “Optimized upconversion emission of NaLuF4:Er,Yb nanocrystals codoped with Gd3+ ions and its mechanism,” J. Alloys Comp. 593, 30-33 (2014).
[Crossref]

Lili Tao, J. D.

Gongxun Bai, J. D., Lili Tao, Kefeng Li, Lili Hu, Yuen H. Tsang, “Efficient 2.7 micron emission from Er3+/Pr3+ codoped oxyfluorotellurite glass,” J. Non-Cryst. Solids 358, 3403-3406 (2012).
[Crossref]

Lim, K. S.

S. A. Song, D. S. Kim, H. M. Jeong, and K. S. Lim, “Upconversion in Nd-Tm-Yb triply doped oxyfluoride glass-ceramics containing CaF2 nanocrystals,” J. Lumin. 152, 75-78 (2014).
[Crossref]

Liu, C.

W. J. Park, C. Liu, and J. Heo, “Direct imaging of the distribution of Nd3+ ions in glasses containing PbS quantum dots,” J. Am. Ceram. Soc. 98, 2074-2077 (2015).
[Crossref]

Liu, X.

F. Wang, D. Banerjee, Y. Liu, X. Chen, and X. Liu, “Upconversion nanoparticles in biological labeling, imaging, and therapy,” Analyst 135, 1839-1854 (2010).
[Crossref]

Liu, Y.

F. Wang, D. Banerjee, Y. Liu, X. Chen, and X. Liu, “Upconversion nanoparticles in biological labeling, imaging, and therapy,” Analyst 135, 1839-1854 (2010).
[Crossref]

G. Chen, G. Somesfalean, Y. Liu, Z. Zhang, and Q. Sun, F. Wang, “Upconversion mechanism for two-color emission in rare-earth-ion-doped ZrO2 nanocrystals,” Phy. Rev. B 75, 195204 (2007).

Liu, Y. L.

S. Q. Man, H. L. Zhang, Y. L. Liu, J. X. Meng, E. Y. B. Pun, and P. S. Chung, “Energy transfer in Pr3+/Yb3+ codoped tellurite glasses,” Opt. Mater. 30, 334-337 (2007).
[Crossref]

Liu, Z.

Z. Liu, B. Mei, J. Song, and W. Li, “Fabrication and optical characterizations of Yb, Er codoped CaF2 transparent ceramic,” J. Eur. Ceram. Soc. 34, 4389-4394 (2014).
[Crossref]

Lu, W.

W. Lu, L. Cheng, H. Zhong, J. Sun, J. Wan, Y. Tian, and B. Chen, “Dependence of upconversion emission intensity on Yb3+ concentration in Er3+/Yb3+ co-doped flake shaped Y2(MoO4)3 phosphors,” J. Phys. D: Appl. Phys. 43, 085404 (2010).

Lupei, A.

A. Lupei, V. Lupei, C. Gheorghe, and A. Ikesue, “Excited states dynamics of Er3+ in Sc2O3 ceramic,” J. Lumin. 128, 918-920 (2008).
[Crossref]

Lupei, V.

A. Lupei, V. Lupei, C. Gheorghe, and A. Ikesue, “Excited states dynamics of Er3+ in Sc2O3 ceramic,” J. Lumin. 128, 918-920 (2008).
[Crossref]

Ma, E.

Z. Hu, Y. Wang, E. Ma, D. Chen, and F. Bao, “Microstructures and upconversion luminescence of Er3+ doped and Er3+/Yb3+ co-doped oxyfluoride glass ceramics,” Mater. Chem. Phys. 101, 234-237 (2007).
[Crossref]

Man, S. Q.

S. Q. Man, H. L. Zhang, Y. L. Liu, J. X. Meng, E. Y. B. Pun, and P. S. Chung, “Energy transfer in Pr3+/Yb3+ codoped tellurite glasses,” Opt. Mater. 30, 334-337 (2007).
[Crossref]

Mei, B.

Z. Liu, B. Mei, J. Song, and W. Li, “Fabrication and optical characterizations of Yb, Er codoped CaF2 transparent ceramic,” J. Eur. Ceram. Soc. 34, 4389-4394 (2014).
[Crossref]

Meng, J. X.

S. Q. Man, H. L. Zhang, Y. L. Liu, J. X. Meng, E. Y. B. Pun, and P. S. Chung, “Energy transfer in Pr3+/Yb3+ codoped tellurite glasses,” Opt. Mater. 30, 334-337 (2007).
[Crossref]

Meza, O.

L. A. Diaz-Torres, O. Meza, D. Solis, P. Salas, and E. D. Rosa, “Visible upconversion emission and non-radiative direct Yb3+ to Er3+ energy transfer processes in nanocrystalline ZrO2:Yb3+, Er3+,” Opt. Laser. Eng. 49, 703-708 (2011).
[Crossref]

Ming, C.

C. Ming, F. Song, and L. Yan, “Spectroscopic study and green upconversion of Pr3+/Yb3+-codoped NaY(WO4)2 crystal,” Opt. Commun. 286, 217-220 (2013).
[Crossref]

Mortier, M.

A. J. Stevenson, H. S.-Brault, P. Gredin, and M. Mortier, “Fluoride materials for optical applications: single crystals, ceramics, glasses, and glass-ceramics,” J. Fluorine Chem. 132, 1165-1173 (2011).
[Crossref]

Ohwaki, J.

Y. Wang and J. Ohwaki, “New transparent vitroceramics codoped with Er3+ and Yb3+ for efficient frequency upconversion,” Appl. Phys. Lett. 63, 3268-3270 (1993).
[Crossref]

Park, S. H.

S. H. Park, D. C. Lee, J. Heo, and D. W. Shin, “Energy transfer between Er3+ and Pr3+ in chalcogenide glasses for dual-wavelength fiber-optic amplifiers,” J. Appl. Phys. 91, 9072-9077 (2002).
[Crossref]

Park, W. J.

W. J. Park, C. Liu, and J. Heo, “Direct imaging of the distribution of Nd3+ ions in glasses containing PbS quantum dots,” J. Am. Ceram. Soc. 98, 2074-2077 (2015).
[Crossref]

Pellé, F.

Pun, E. Y. B.

S. Q. Man, H. L. Zhang, Y. L. Liu, J. X. Meng, E. Y. B. Pun, and P. S. Chung, “Energy transfer in Pr3+/Yb3+ codoped tellurite glasses,” Opt. Mater. 30, 334-337 (2007).
[Crossref]

Qiao, X.

X. Qiao, X. Fan, J. Wang, and M. Wang, “Luminescence behavior of Er3+ ions in glass-ceramics containing CaF2 nanocrystals,” J. Non-Cryst. Solids 351, 357-363 (2005).
[Crossref]

Qiao, Y.

X. Zhang, X. Wang, Y. Qiao, and H. Guo, “Synthesis and photoluminescent properties of Gd3O4Br:Er3+ phosphors prepared by solid-state reaction method,” Opt. Mater. 32, 216-220 (2009).
[Crossref]

Rai, A.

Y. Dwivedi, A. Rai, and S. B. Rai, “Intense white upconversion emission in Pr/Er/Yb codoped tellurite glass,” J. Appl. Phys. 104, 043509 (2008)

Rai, S. B.

R. S. Yadav, R. K. Verma, A. Bahadur, S. B. Rai, “Structural characterizations and intense green upconversion emission in Yb3+, Pr3+ co-doped Y2O3 nano-phosphor,” Spectrochim. Acta Part A 137, 357-362 (2015).
[Crossref]

Y. Dwivedi, A. Rai, and S. B. Rai, “Intense white upconversion emission in Pr/Er/Yb codoped tellurite glass,” J. Appl. Phys. 104, 043509 (2008)

Rand, S. C.

T. R. Hinklin, S. C. Rand, and R. M. Laine, “Transparent, polycrystalline upconverting nanoceramics: towards 3-D displays,” Adv. Mater. 20, 1-4 (2008).
[Crossref]

Rosa, E. D.

L. A. Diaz-Torres, O. Meza, D. Solis, P. Salas, and E. D. Rosa, “Visible upconversion emission and non-radiative direct Yb3+ to Er3+ energy transfer processes in nanocrystalline ZrO2:Yb3+, Er3+,” Opt. Laser. Eng. 49, 703-708 (2011).
[Crossref]

Rozanski, M.

M. Rozanski, K. Wisniewski, J. Szatkowski, C. Koepke, M. Sroda, “Effect of thermal treatment on excited state spectroscopy of oxyfluoride borosilicate glass activated by Pr3+ ions,” Opt. Mater. 31, 548-553 (2009).
[Crossref]

Rüsel, C.

S. Haas, A. Hoell, R. Wurth, C. Rüsel, P. Boesecke, and U. Vainio, “Analysis of nanostructure and nanochemistry by ASAXS: Accessing phase composition of oxyfluoride glass ceramics doped with Er3+/Yb3+,” Phys. Rev. B 81, 184207 (2010).

Salas, P.

L. A. Diaz-Torres, O. Meza, D. Solis, P. Salas, and E. D. Rosa, “Visible upconversion emission and non-radiative direct Yb3+ to Er3+ energy transfer processes in nanocrystalline ZrO2:Yb3+, Er3+,” Opt. Laser. Eng. 49, 703-708 (2011).
[Crossref]

Shi, S.

T. Wang, J. Zhou, S. Shi, B. Li, and R. Zong, “Preparation of size-controlled nanocrystalline infrared-to-visible upconverting phosphors Gd2O3: Yb, Er by using a water-in-oil microemulsion system,” J. Electroceram. 21, 765-769 (2008).
[Crossref]

Shin, D. W.

S. H. Park, D. C. Lee, J. Heo, and D. W. Shin, “Energy transfer between Er3+ and Pr3+ in chalcogenide glasses for dual-wavelength fiber-optic amplifiers,” J. Appl. Phys. 91, 9072-9077 (2002).
[Crossref]

Sievers, A. J.

J. Tua, S. A. FitzGeralda, J. A. Campbellb, and A. J. Sievers, “Glass-like properties observed in low-frequency Raman scattering of mixed fluorite crystals,” J. Non-Cryst. Solids 203, 153-158 (1996).
[Crossref]

Singh, R. D.

J. P. Srivastava and R. D. Singh, “Infrared lattice vibrational spectrum of CaF2,” J. Phys. C: Solid State Phys. 4, L47-49 (1971).
[Crossref]

Solis, D.

L. A. Diaz-Torres, O. Meza, D. Solis, P. Salas, and E. D. Rosa, “Visible upconversion emission and non-radiative direct Yb3+ to Er3+ energy transfer processes in nanocrystalline ZrO2:Yb3+, Er3+,” Opt. Laser. Eng. 49, 703-708 (2011).
[Crossref]

Somesfalean, G.

G. Chen, G. Somesfalean, Y. Liu, Z. Zhang, and Q. Sun, F. Wang, “Upconversion mechanism for two-color emission in rare-earth-ion-doped ZrO2 nanocrystals,” Phy. Rev. B 75, 195204 (2007).

Song, F.

C. Ming, F. Song, and L. Yan, “Spectroscopic study and green upconversion of Pr3+/Yb3+-codoped NaY(WO4)2 crystal,” Opt. Commun. 286, 217-220 (2013).
[Crossref]

Song, J.

Z. Liu, B. Mei, J. Song, and W. Li, “Fabrication and optical characterizations of Yb, Er codoped CaF2 transparent ceramic,” J. Eur. Ceram. Soc. 34, 4389-4394 (2014).
[Crossref]

Song, S. A.

S. A. Song, D. S. Kim, H. M. Jeong, and K. S. Lim, “Upconversion in Nd-Tm-Yb triply doped oxyfluoride glass-ceramics containing CaF2 nanocrystals,” J. Lumin. 152, 75-78 (2014).
[Crossref]

Srivastava, J. P.

J. P. Srivastava and R. D. Singh, “Infrared lattice vibrational spectrum of CaF2,” J. Phys. C: Solid State Phys. 4, L47-49 (1971).
[Crossref]

Sroda, M.

M. Rozanski, K. Wisniewski, J. Szatkowski, C. Koepke, M. Sroda, “Effect of thermal treatment on excited state spectroscopy of oxyfluoride borosilicate glass activated by Pr3+ ions,” Opt. Mater. 31, 548-553 (2009).
[Crossref]

Stevenson, A. J.

A. J. Stevenson, H. S.-Brault, P. Gredin, and M. Mortier, “Fluoride materials for optical applications: single crystals, ceramics, glasses, and glass-ceramics,” J. Fluorine Chem. 132, 1165-1173 (2011).
[Crossref]

Sun, J.

W. Lu, L. Cheng, H. Zhong, J. Sun, J. Wan, Y. Tian, and B. Chen, “Dependence of upconversion emission intensity on Yb3+ concentration in Er3+/Yb3+ co-doped flake shaped Y2(MoO4)3 phosphors,” J. Phys. D: Appl. Phys. 43, 085404 (2010).

Sun, Q.

G. Chen, G. Somesfalean, Y. Liu, Z. Zhang, and Q. Sun, F. Wang, “Upconversion mechanism for two-color emission in rare-earth-ion-doped ZrO2 nanocrystals,” Phy. Rev. B 75, 195204 (2007).

Szatkowski, J.

M. Rozanski, K. Wisniewski, J. Szatkowski, C. Koepke, M. Sroda, “Effect of thermal treatment on excited state spectroscopy of oxyfluoride borosilicate glass activated by Pr3+ ions,” Opt. Mater. 31, 548-553 (2009).
[Crossref]

Tian, Y.

W. Lu, L. Cheng, H. Zhong, J. Sun, J. Wan, Y. Tian, and B. Chen, “Dependence of upconversion emission intensity on Yb3+ concentration in Er3+/Yb3+ co-doped flake shaped Y2(MoO4)3 phosphors,” J. Phys. D: Appl. Phys. 43, 085404 (2010).

Tsang, Yuen H.

Gongxun Bai, J. D., Lili Tao, Kefeng Li, Lili Hu, Yuen H. Tsang, “Efficient 2.7 micron emission from Er3+/Pr3+ codoped oxyfluorotellurite glass,” J. Non-Cryst. Solids 358, 3403-3406 (2012).
[Crossref]

Tua, J.

J. Tua, S. A. FitzGeralda, J. A. Campbellb, and A. J. Sievers, “Glass-like properties observed in low-frequency Raman scattering of mixed fluorite crystals,” J. Non-Cryst. Solids 203, 153-158 (1996).
[Crossref]

Vainio, U.

S. Haas, A. Hoell, R. Wurth, C. Rüsel, P. Boesecke, and U. Vainio, “Analysis of nanostructure and nanochemistry by ASAXS: Accessing phase composition of oxyfluoride glass ceramics doped with Er3+/Yb3+,” Phys. Rev. B 81, 184207 (2010).

Verma, R. K.

R. S. Yadav, R. K. Verma, A. Bahadur, S. B. Rai, “Structural characterizations and intense green upconversion emission in Yb3+, Pr3+ co-doped Y2O3 nano-phosphor,” Spectrochim. Acta Part A 137, 357-362 (2015).
[Crossref]

Wan, J.

W. Lu, L. Cheng, H. Zhong, J. Sun, J. Wan, Y. Tian, and B. Chen, “Dependence of upconversion emission intensity on Yb3+ concentration in Er3+/Yb3+ co-doped flake shaped Y2(MoO4)3 phosphors,” J. Phys. D: Appl. Phys. 43, 085404 (2010).

Wang, F.

F. Wang, D. Banerjee, Y. Liu, X. Chen, and X. Liu, “Upconversion nanoparticles in biological labeling, imaging, and therapy,” Analyst 135, 1839-1854 (2010).
[Crossref]

G. Chen, G. Somesfalean, Y. Liu, Z. Zhang, and Q. Sun, F. Wang, “Upconversion mechanism for two-color emission in rare-earth-ion-doped ZrO2 nanocrystals,” Phy. Rev. B 75, 195204 (2007).

Wang, J.

X. Qiao, X. Fan, J. Wang, and M. Wang, “Luminescence behavior of Er3+ ions in glass-ceramics containing CaF2 nanocrystals,” J. Non-Cryst. Solids 351, 357-363 (2005).
[Crossref]

Wang, M.

X. Qiao, X. Fan, J. Wang, and M. Wang, “Luminescence behavior of Er3+ ions in glass-ceramics containing CaF2 nanocrystals,” J. Non-Cryst. Solids 351, 357-363 (2005).
[Crossref]

Wang, T.

T. Wang, J. Zhou, S. Shi, B. Li, and R. Zong, “Preparation of size-controlled nanocrystalline infrared-to-visible upconverting phosphors Gd2O3: Yb, Er by using a water-in-oil microemulsion system,” J. Electroceram. 21, 765-769 (2008).
[Crossref]

Wang, X.

X. Zhang, X. Wang, Y. Qiao, and H. Guo, “Synthesis and photoluminescent properties of Gd3O4Br:Er3+ phosphors prepared by solid-state reaction method,” Opt. Mater. 32, 216-220 (2009).
[Crossref]

Wang, Y.

Z. Hu, Y. Wang, E. Ma, D. Chen, and F. Bao, “Microstructures and upconversion luminescence of Er3+ doped and Er3+/Yb3+ co-doped oxyfluoride glass ceramics,” Mater. Chem. Phys. 101, 234-237 (2007).
[Crossref]

Y. Wang and J. Ohwaki, “New transparent vitroceramics codoped with Er3+ and Yb3+ for efficient frequency upconversion,” Appl. Phys. Lett. 63, 3268-3270 (1993).
[Crossref]

Wei, X.

J. Cai, X. Wei, F. Hu, Z. Cao, L. Zhao, Y. Chen, C. Duan, and M. Yin, “Up-conversion luminescence and optical thermometry properties of transparent glassceramics containing CaF2:Yb/Er nanocrystals,” Ceram. Int. 42, 13990-13995 (2016).
[Crossref]

Wisniewski, K.

M. Rozanski, K. Wisniewski, J. Szatkowski, C. Koepke, M. Sroda, “Effect of thermal treatment on excited state spectroscopy of oxyfluoride borosilicate glass activated by Pr3+ ions,” Opt. Mater. 31, 548-553 (2009).
[Crossref]

Wurth, R.

S. Haas, A. Hoell, R. Wurth, C. Rüsel, P. Boesecke, and U. Vainio, “Analysis of nanostructure and nanochemistry by ASAXS: Accessing phase composition of oxyfluoride glass ceramics doped with Er3+/Yb3+,” Phys. Rev. B 81, 184207 (2010).

Xiao, Z.

F. Zhang, Z. Bi, A. Huang, and Z. Xiao, “Visible luminescence properties of Er3+/ Pr3+ codoped fluorotellurite glasses,” Opt. Mater. 41, 112-115 (2015).
[Crossref]

Xu, Zheng

Y. C. Suling, Zhao, Zhiqin Liang, Meng Han, Zheng Xu, “Optimized upconversion emission of NaLuF4:Er,Yb nanocrystals codoped with Gd3+ ions and its mechanism,” J. Alloys Comp. 593, 30-33 (2014).
[Crossref]

Yadav, R. S.

R. S. Yadav, R. K. Verma, A. Bahadur, S. B. Rai, “Structural characterizations and intense green upconversion emission in Yb3+, Pr3+ co-doped Y2O3 nano-phosphor,” Spectrochim. Acta Part A 137, 357-362 (2015).
[Crossref]

Yan, L.

C. Ming, F. Song, and L. Yan, “Spectroscopic study and green upconversion of Pr3+/Yb3+-codoped NaY(WO4)2 crystal,” Opt. Commun. 286, 217-220 (2013).
[Crossref]

Yin, M.

J. Cai, X. Wei, F. Hu, Z. Cao, L. Zhao, Y. Chen, C. Duan, and M. Yin, “Up-conversion luminescence and optical thermometry properties of transparent glassceramics containing CaF2:Yb/Er nanocrystals,” Ceram. Int. 42, 13990-13995 (2016).
[Crossref]

Zhang, F.

F. Zhang, Z. Bi, A. Huang, and Z. Xiao, “Visible luminescence properties of Er3+/ Pr3+ codoped fluorotellurite glasses,” Opt. Mater. 41, 112-115 (2015).
[Crossref]

Zhang, H. L.

S. Q. Man, H. L. Zhang, Y. L. Liu, J. X. Meng, E. Y. B. Pun, and P. S. Chung, “Energy transfer in Pr3+/Yb3+ codoped tellurite glasses,” Opt. Mater. 30, 334-337 (2007).
[Crossref]

Zhang, X.

X. Zhang, X. Wang, Y. Qiao, and H. Guo, “Synthesis and photoluminescent properties of Gd3O4Br:Er3+ phosphors prepared by solid-state reaction method,” Opt. Mater. 32, 216-220 (2009).
[Crossref]

Zhang, Z.

G. Chen, G. Somesfalean, Y. Liu, Z. Zhang, and Q. Sun, F. Wang, “Upconversion mechanism for two-color emission in rare-earth-ion-doped ZrO2 nanocrystals,” Phy. Rev. B 75, 195204 (2007).

Zhao, L.

J. Cai, X. Wei, F. Hu, Z. Cao, L. Zhao, Y. Chen, C. Duan, and M. Yin, “Up-conversion luminescence and optical thermometry properties of transparent glassceramics containing CaF2:Yb/Er nanocrystals,” Ceram. Int. 42, 13990-13995 (2016).
[Crossref]

Zhao, Suling

Y. C. Suling, Zhao, Zhiqin Liang, Meng Han, Zheng Xu, “Optimized upconversion emission of NaLuF4:Er,Yb nanocrystals codoped with Gd3+ ions and its mechanism,” J. Alloys Comp. 593, 30-33 (2014).
[Crossref]

Zhong, H.

W. Lu, L. Cheng, H. Zhong, J. Sun, J. Wan, Y. Tian, and B. Chen, “Dependence of upconversion emission intensity on Yb3+ concentration in Er3+/Yb3+ co-doped flake shaped Y2(MoO4)3 phosphors,” J. Phys. D: Appl. Phys. 43, 085404 (2010).

Zhou, J.

T. Wang, J. Zhou, S. Shi, B. Li, and R. Zong, “Preparation of size-controlled nanocrystalline infrared-to-visible upconverting phosphors Gd2O3: Yb, Er by using a water-in-oil microemulsion system,” J. Electroceram. 21, 765-769 (2008).
[Crossref]

Zong, R.

T. Wang, J. Zhou, S. Shi, B. Li, and R. Zong, “Preparation of size-controlled nanocrystalline infrared-to-visible upconverting phosphors Gd2O3: Yb, Er by using a water-in-oil microemulsion system,” J. Electroceram. 21, 765-769 (2008).
[Crossref]

Adv. Mater. (1)

T. R. Hinklin, S. C. Rand, and R. M. Laine, “Transparent, polycrystalline upconverting nanoceramics: towards 3-D displays,” Adv. Mater. 20, 1-4 (2008).
[Crossref]

Analyst (1)

F. Wang, D. Banerjee, Y. Liu, X. Chen, and X. Liu, “Upconversion nanoparticles in biological labeling, imaging, and therapy,” Analyst 135, 1839-1854 (2010).
[Crossref]

Appl. Phys. Lett. (1)

Y. Wang and J. Ohwaki, “New transparent vitroceramics codoped with Er3+ and Yb3+ for efficient frequency upconversion,” Appl. Phys. Lett. 63, 3268-3270 (1993).
[Crossref]

Ceram. Int. (1)

J. Cai, X. Wei, F. Hu, Z. Cao, L. Zhao, Y. Chen, C. Duan, and M. Yin, “Up-conversion luminescence and optical thermometry properties of transparent glassceramics containing CaF2:Yb/Er nanocrystals,” Ceram. Int. 42, 13990-13995 (2016).
[Crossref]

J. Alloys Comp. (1)

Y. C. Suling, Zhao, Zhiqin Liang, Meng Han, Zheng Xu, “Optimized upconversion emission of NaLuF4:Er,Yb nanocrystals codoped with Gd3+ ions and its mechanism,” J. Alloys Comp. 593, 30-33 (2014).
[Crossref]

J. Am. Ceram. Soc. (1)

W. J. Park, C. Liu, and J. Heo, “Direct imaging of the distribution of Nd3+ ions in glasses containing PbS quantum dots,” J. Am. Ceram. Soc. 98, 2074-2077 (2015).
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J. Appl. Phys. (2)

Y. Dwivedi, A. Rai, and S. B. Rai, “Intense white upconversion emission in Pr/Er/Yb codoped tellurite glass,” J. Appl. Phys. 104, 043509 (2008)

S. H. Park, D. C. Lee, J. Heo, and D. W. Shin, “Energy transfer between Er3+ and Pr3+ in chalcogenide glasses for dual-wavelength fiber-optic amplifiers,” J. Appl. Phys. 91, 9072-9077 (2002).
[Crossref]

J. Electroceram. (1)

T. Wang, J. Zhou, S. Shi, B. Li, and R. Zong, “Preparation of size-controlled nanocrystalline infrared-to-visible upconverting phosphors Gd2O3: Yb, Er by using a water-in-oil microemulsion system,” J. Electroceram. 21, 765-769 (2008).
[Crossref]

J. Eur. Ceram. Soc. (1)

Z. Liu, B. Mei, J. Song, and W. Li, “Fabrication and optical characterizations of Yb, Er codoped CaF2 transparent ceramic,” J. Eur. Ceram. Soc. 34, 4389-4394 (2014).
[Crossref]

J. Fluorine Chem. (1)

A. J. Stevenson, H. S.-Brault, P. Gredin, and M. Mortier, “Fluoride materials for optical applications: single crystals, ceramics, glasses, and glass-ceramics,” J. Fluorine Chem. 132, 1165-1173 (2011).
[Crossref]

J. Lumin. (2)

S. A. Song, D. S. Kim, H. M. Jeong, and K. S. Lim, “Upconversion in Nd-Tm-Yb triply doped oxyfluoride glass-ceramics containing CaF2 nanocrystals,” J. Lumin. 152, 75-78 (2014).
[Crossref]

A. Lupei, V. Lupei, C. Gheorghe, and A. Ikesue, “Excited states dynamics of Er3+ in Sc2O3 ceramic,” J. Lumin. 128, 918-920 (2008).
[Crossref]

J. Non-Cryst. Solids (3)

J. Tua, S. A. FitzGeralda, J. A. Campbellb, and A. J. Sievers, “Glass-like properties observed in low-frequency Raman scattering of mixed fluorite crystals,” J. Non-Cryst. Solids 203, 153-158 (1996).
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Gongxun Bai, J. D., Lili Tao, Kefeng Li, Lili Hu, Yuen H. Tsang, “Efficient 2.7 micron emission from Er3+/Pr3+ codoped oxyfluorotellurite glass,” J. Non-Cryst. Solids 358, 3403-3406 (2012).
[Crossref]

X. Qiao, X. Fan, J. Wang, and M. Wang, “Luminescence behavior of Er3+ ions in glass-ceramics containing CaF2 nanocrystals,” J. Non-Cryst. Solids 351, 357-363 (2005).
[Crossref]

J. Opt. Soc. Am. (1)

D. J. Coleman, P. Golding, and T. A. King, “Spectroscopic and energy-transfer parameters for Er3+-doped and Er3+, Pr3+-codoped GeGaS glasses,” J. Opt. Soc. Am. 19, 1982-1989 (2002).
[Crossref]

J. Opt. Soc. Am. B (1)

J. Phys. C: Solid State Phys. (1)

J. P. Srivastava and R. D. Singh, “Infrared lattice vibrational spectrum of CaF2,” J. Phys. C: Solid State Phys. 4, L47-49 (1971).
[Crossref]

J. Phys. D: Appl. Phys. (1)

W. Lu, L. Cheng, H. Zhong, J. Sun, J. Wan, Y. Tian, and B. Chen, “Dependence of upconversion emission intensity on Yb3+ concentration in Er3+/Yb3+ co-doped flake shaped Y2(MoO4)3 phosphors,” J. Phys. D: Appl. Phys. 43, 085404 (2010).

Mater. Chem. Phys. (1)

Z. Hu, Y. Wang, E. Ma, D. Chen, and F. Bao, “Microstructures and upconversion luminescence of Er3+ doped and Er3+/Yb3+ co-doped oxyfluoride glass ceramics,” Mater. Chem. Phys. 101, 234-237 (2007).
[Crossref]

Opt. Commun. (1)

C. Ming, F. Song, and L. Yan, “Spectroscopic study and green upconversion of Pr3+/Yb3+-codoped NaY(WO4)2 crystal,” Opt. Commun. 286, 217-220 (2013).
[Crossref]

Opt. Laser. Eng. (1)

L. A. Diaz-Torres, O. Meza, D. Solis, P. Salas, and E. D. Rosa, “Visible upconversion emission and non-radiative direct Yb3+ to Er3+ energy transfer processes in nanocrystalline ZrO2:Yb3+, Er3+,” Opt. Laser. Eng. 49, 703-708 (2011).
[Crossref]

Opt. Mater. (4)

S. Q. Man, H. L. Zhang, Y. L. Liu, J. X. Meng, E. Y. B. Pun, and P. S. Chung, “Energy transfer in Pr3+/Yb3+ codoped tellurite glasses,” Opt. Mater. 30, 334-337 (2007).
[Crossref]

M. Rozanski, K. Wisniewski, J. Szatkowski, C. Koepke, M. Sroda, “Effect of thermal treatment on excited state spectroscopy of oxyfluoride borosilicate glass activated by Pr3+ ions,” Opt. Mater. 31, 548-553 (2009).
[Crossref]

X. Zhang, X. Wang, Y. Qiao, and H. Guo, “Synthesis and photoluminescent properties of Gd3O4Br:Er3+ phosphors prepared by solid-state reaction method,” Opt. Mater. 32, 216-220 (2009).
[Crossref]

F. Zhang, Z. Bi, A. Huang, and Z. Xiao, “Visible luminescence properties of Er3+/ Pr3+ codoped fluorotellurite glasses,” Opt. Mater. 41, 112-115 (2015).
[Crossref]

Phy. Rev. B (1)

G. Chen, G. Somesfalean, Y. Liu, Z. Zhang, and Q. Sun, F. Wang, “Upconversion mechanism for two-color emission in rare-earth-ion-doped ZrO2 nanocrystals,” Phy. Rev. B 75, 195204 (2007).

Phys. Rev. B (2)

M. P. Hehlen, N. J. Cockroft, T. R. Gosnell, and A. J. Bruce, “Spectroscopic properties of Er3+ and Yb3+ doped soda-lime silicate and aluminosilicate glasses, Phys. Rev. B 56, 9302-9318 (1997).
[Crossref]

S. Haas, A. Hoell, R. Wurth, C. Rüsel, P. Boesecke, and U. Vainio, “Analysis of nanostructure and nanochemistry by ASAXS: Accessing phase composition of oxyfluoride glass ceramics doped with Er3+/Yb3+,” Phys. Rev. B 81, 184207 (2010).

Spectrochim. Acta Part A (1)

R. S. Yadav, R. K. Verma, A. Bahadur, S. B. Rai, “Structural characterizations and intense green upconversion emission in Yb3+, Pr3+ co-doped Y2O3 nano-phosphor,” Spectrochim. Acta Part A 137, 357-362 (2015).
[Crossref]

Other (1)

H. P. Klug and L. E. Alexander, X-ray Diffraction Procedures, 2nd ed. (Wiley, New York, USA, 1974).

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