Ca2GeO4 ∶Eu3+ 的电子结构和紫外-真空紫外发光特性的研究

秦青松; 于明汇; 周宏亮; 周美娇; 项晓天; 李晓的; 曾俊玺; 张加驰

doi:10.7498/aps.60.067802

摘要

采用高温固相法合成了发光材料Ca2GeO4 ∶Eu3+ ,并详细研究了其紫外-真空紫外发光特性. 发现并解释了Eu3+ 离子在空气中的自还原以及在不同波长激发下的颜色转换现象. Ca2GeO4 ∶Eu3+ 在163—230和301,466 nm处具有强激发带,表明Ca2GeO4 ∶Eu3+

关键词:

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.

Keywords:

作者及机构信息

1.
兰州大学磁学与磁性材料教育部重点实验室, 兰州 730000

基金项目: 国家自然科学青年科学基金(批准号: 502041032)和国家大学生创新实验计划(批准号:101073005)资助的课题.

Authors and contacts

1.
Key Laboratory for Magnetism and Magnetic Materials of Ministry of Education, Lanzhou University, Lanzhou 730000, China

参考文献

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施引文献

[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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