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Red emitting Ca2GeO4 ∶Eu3+ phosphors are synthesized by solid state method. The ultraviolet and vacuum ultraviolet excited photoluminescence properties are investigated in detail. The phenomenon of reduction of Eu3+ ions in air and the color switches are discovered and explained. The Ca2GeO4 ∶Eu3+ presents intense excitation intensities at 163—230, 301 and 466 nm, showing the potential applications in plasma display panels and light emitting diodes. The excitation spectra are studied to identify the photoluminescence mechanism of Ca2GeO4 ∶Eu3+ . First principles calculation within the local density approximation of the density functional theory is used to calculate the electronic structure and the linear optical properties of Ca2GeO4.
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Keywords:
- Ca2GeO4 ∶Eu3+ /
- photoluminescence mechanism /
- reduction in air /
- color switch
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[4] Xiao T, Kitai A H, Liu G, Nakau A 1997 Digest of Technical Papers 1997 SID International Symposium Boston, USA p 415
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[10] Yang H M, Shi J X, Liang H B, Gong M L 2006 Mater. Res. Bull. 41 867
[11] Yang H M, Shi J X, Gong M L, Liang H B 2010 Mater. Lett. 64 1034
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[25] Wu X C, Song W H, Zhao B, Sun Y P, Du J J 2001 Chem. Phys. Lett. 349 210
[26] Gaft M L, Gorobets B S 1979 J. Appl. Spectrosc. (USSR) 31 1488
[27] Pei Z, Su Q, Zhang J 1993 Alloy J Compd. 198 51
[28] Peterson J R, Xu W, Dai S 1995 Chem. Mater. 7 1686
[29] Liang H, He H, Zeng Q, Wang S, Su Q, Tao Y, Hu T, Wang W, Liu T, Zhang J, Hou X 2002 J. Electron. Spectrosc. Relat. Phenom. 124 67
[30] Zeng Q, Pei Z, Wang S, Su Q 1999 Chem. Mater. 11 605
[31] Liang H B, Su Q, Tao Y, Hu T D, Liu T 2002 J. Phys. Chem. Solid. 63 719
[32] Liang H, Tao Y, Su Q, Wang S 2002 J. Solid. State. Chem. 167 435
[33] Pei Z, Zeng Q, Su Q 1999 J. Solid. State. Chem. 145 212
[34] Zeng X Q, Im S J, Jang S H, Kim Y M, Park H B, Son S H, Hatanaka H, Kim G Y, Kim S G 2006 J. Lumin. 121 1
[35] Jones R O, Gunnarsson O 1989 Rev. Mod. Phys. 61 689
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[1] Chen X B, Zhang G Y, Chen J K, Wang Y H, Liu B, Shang M R, Li J W 1993 Chin. Phys. 2 695
[2] Wang Z J, Li P L, Wang G, Yang Z P, Guo Q L 2008 Acta Phys. Sin. 57 4575 (in Chinese) [王志军、 李盼来、 王 刚、 杨志平、 郭庆林 2008 57 4575]
[3] Zhang J C, Wang Y H 2008 Chin. Phys. Lett. 25 1453
[4] Xiao T, Kitai A H, Liu G, Nakau A 1997 Digest of Technical Papers 1997 SID International Symposium Boston, USA p 415
[5] Liu J D, Wang Y H 2010 Acta Phys. Sin. 59 3558 (in Chinese) [刘吉地、 王育华 2010 59 3558]
[6] Zhao F, Guo P M, Li G B, Liao F H, Tian S J, Jing X P 2003 Mater. Res. Bull. 38 931
[7] Guo P M, Zhao F, Li G B, Liao F H, Tian S J, Jing X P 2003 J. Lumin. 105 61
[8] Jiang Z Q, Wang Y H, Ci Z P, Jiao H Y 2009 J. Electrochem. Soc. 156 J 317
[9] Toda K J, Imanari Y, Nonogawa T 2003 Chem. Lett. 32 346
[10] Yang H M, Shi J X, Liang H B, Gong M L 2006 Mater. Res. Bull. 41 867
[11] Yang H M, Shi J X, Gong M L, Liang H B 2010 Mater. Lett. 64 1034
[12] Brunold T, Herren M, Oetliker U, Giidel H U, Kesper U, Albrecht C, Reinen D 1994 J. Lumin. 60/61 138
[13] Evans J M, Petricevic V, Bykov A B, Alfano R R 1997 Opt. Lett. 22 1171
[14] Hohenberg P, Kohn W 1964 Phys. Rev. 136 B864
[15] Kohn W, Sham L J 1965 Phys. Rev. 140 A1133
[16] CASTEP 3.5 1997 Molecular Simulations Inc.
[17] Payne M C, Teter M P, Allan D C, Arias T A, Joannopoulos J D 1992 Rev. Mod. Phys. 64 1045
[18] Rappe A M, Rabe K M, Kaxiras E, Joannopoulos J D 1990 Phys. Rev. B 41 1227
[19] Lin J S, Qteish A, Payne M C, Heine V 1993 Phys. Rev. B 47 4174
[20] Kleinman L, Bylander D M 1982 Phys. Rev. Lett. 48 1425
[21] Hahn E 1970 Z. Kristallogr. 131 322
[22] Bergerhoff G, Berndt M, Brandenburg K 1996 J. Res. Natl. Inst. Stand. Technol. 101 221
[23] Brandenburg K, Berndt M 1999 J. Appl. Cryst. 32 1028
[24] Thim G P, Brito H F, Silva S A, Oliveira M A S, Felintoc M C F C 2003 J. Solid. State. Chem. 171 375
[25] Wu X C, Song W H, Zhao B, Sun Y P, Du J J 2001 Chem. Phys. Lett. 349 210
[26] Gaft M L, Gorobets B S 1979 J. Appl. Spectrosc. (USSR) 31 1488
[27] Pei Z, Su Q, Zhang J 1993 Alloy J Compd. 198 51
[28] Peterson J R, Xu W, Dai S 1995 Chem. Mater. 7 1686
[29] Liang H, He H, Zeng Q, Wang S, Su Q, Tao Y, Hu T, Wang W, Liu T, Zhang J, Hou X 2002 J. Electron. Spectrosc. Relat. Phenom. 124 67
[30] Zeng Q, Pei Z, Wang S, Su Q 1999 Chem. Mater. 11 605
[31] Liang H B, Su Q, Tao Y, Hu T D, Liu T 2002 J. Phys. Chem. Solid. 63 719
[32] Liang H, Tao Y, Su Q, Wang S 2002 J. Solid. State. Chem. 167 435
[33] Pei Z, Zeng Q, Su Q 1999 J. Solid. State. Chem. 145 212
[34] Zeng X Q, Im S J, Jang S H, Kim Y M, Park H B, Son S H, Hatanaka H, Kim G Y, Kim S G 2006 J. Lumin. 121 1
[35] Jones R O, Gunnarsson O 1989 Rev. Mod. Phys. 61 689
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