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Eu3+ doped Gd2W2O9 and Gd2(WO4)3 nanophosphors with different concentrations were prepared via a co-precipitation method. The structure and morphology of the nanocrystal samples were characterized by using X-ray diffraction (XRD) and field emission scanning electron microscopy (FE-SEM). The emission spectra and excitation spectra of the samples were measured, the J-O parameters and the quantum efficiencies of the 5D0 level of Eu3+ of the samples were calculated, and the concentration quenching curves of Eu3+ luminescence in different hosts were given. The study results indicate that similar to the Gd2(WO4)3:Eu, the red emission of Eu3+ 5D0 → 7F2 transition in Gd2W2O9:Eu can also be effectively excited by 395 nm near-UV light and 465 nm blue light. So the Gd2W2O9:Eu red phosphors may have a potential application for white light emitting diodes.
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Keywords:
- white LED /
- red nanophosphors /
- Eu3+ /
- tungstate
[1] Wan Y, Han W J, Liu J H, Xia L H, Mateos X, Petrov V, Zhang H J, Wang J Y 2009 Acta Phys. Sin. 58 278(in Chinese) [万 勇、韩文娟、刘均海、夏临华、Xavier Mateos、Valentin Petrov、张怀金、王继扬 2009 58 278]
[2] Zang J C, Zheng K, Zou Y L, Wu J P, Song Y R, Liu G Q, Feng B H, Zhang D X, Liu Y L, Zhu K 2010 Acta Phys. Sin. 59 609(in Chinese) [臧竞存、郑 锴、邹玉林、吴敬朋、宋晏蓉、刘国庆、冯宝华、张东香、刘玉龙、朱 恪 2010 59 609]
[3] Chen G X, Zhang Q Y, Zhao C, Shi D M, Jiang Z H 2010 Acta Phys. Sin. 59 1321(in Chinese) [陈敢新、张勤远、赵 纯、石冬梅、姜中宏 2010 59 1321]
[4] Vodchits A I, Orlovich V A, Apanasevich P A, Basiev T T, Zverev P G 2007 Opt. Mater. 29 1616
[5] Huang J P, H. S. Luo, Zhou P L, Yu X B, Li Y K 2007 J. Lumin. 126 881
[6] Ryu J H, Bang S Y, Kim W S, Park G S, Kim K M, Yoon J W, Shim K B, Koshizaki N 2007 J. Alloys Compd. 441 146
[7] Longo V M, Orhan E, Cavalcante L S, Porto S L, Espinosa J W M, Varela J A, Longo E 2007 Chem. Phys. 334 180
[8] Bhargava R N, Gallagher D, Hong X, Nurmikko A 1994 Phys. Rev. Lett. 72 416
[9] Bhargava R N 1996 J. Lumin. 70 85
[10] Jia M L, Zhang J H, Lu S Z, Sun J T, Luo Y S, Ren X G, Song H W and Wang X J 2004 Chem. Phys. Lett. 384 193
[11] Song H W, Chen B J, Peng H S, Zhang J S 2002 Appl. Phys. Lett. 81 1776
[12] Zhao C H,Zhang B P, Shang P P 2009 Chin. Phys. B 18 5539
[13] Kodaira C A, Brito H F, Malta O L, Serra O A 2003 J. Lumin. 101 11
[14] Kodaira C A, Brito H F, Felinto M C F C 2003 J. Solid State Chem. 171 401
[15] Jia P Y, Liu X M, Yu M, Luo Y, Fang J, Lin J 2006 Chem. Phys. Lett. 424 358
[16] Pullar R C, Farrah S, Alford N McN 2007 Journal of the European Ceramic Society 27 1059
[17] Kodaira C A, Brito H F, Teotonio E E S, Felinto M C F C, Malta O L, Brito G E S 2004 J. Braz. Chem. Soc. 15 890
[18] Wang Y G, Ma J F, Tao J T, Zhu X Y, Zhou J, Zhao Z Q, Xie L J, Tian H 2007 Ceramics International 33 1125
[19] Fu H B,.Pan C S, Zhang L W, Zhu Y F 2007 Mater. Res. Bull. 42 696
[20] Di W H, Wang X J, Chen B J, Lu S Z, Zhao X X 2005 J. Phys. Chem. B 109 13154
[21] He C, Guan Y F, Yao L Z, Cai W L, Lia X G, Yao Z 2003 Mater. Res. Bull. 38 973
[22] Huang Y H, Jiang D L, Zhang J X, Lin Q L 2010 Acta Phys. Sin. 59 300(in Chinese) [黄毅华、江东亮、张景贤、林庆玲 2010 59 300]
[23] Jiang B X, Huang T D, Wu Y S, Liu W B, Pan Y B, Feng T, Yang Q H 2008 Chin. Phys. B 17 3407
[24] Judd B R 1962 Phys. Rev. 127 750
[25] Ofelt G S 1962 J. Chem. Phys. 37 511
[26] Ray S, Pramanik P, Singha A, Roy A 2005 J. Appl. Phys. 97 094312
[27] Nishimura G, Kushida T 1988 Phys. Rev. B 37 9075
[28] Reisfeld R, Greenberg E, Brown R N, Drexhage M G, Jφrgensen C K 1983 Chem. Phys. Lett. 95 91
[29] Tian Y, Qi X H, Wu X W, Hua R N, Chen B J 2009 J. Phys. Chem. C 113 10767
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[1] Wan Y, Han W J, Liu J H, Xia L H, Mateos X, Petrov V, Zhang H J, Wang J Y 2009 Acta Phys. Sin. 58 278(in Chinese) [万 勇、韩文娟、刘均海、夏临华、Xavier Mateos、Valentin Petrov、张怀金、王继扬 2009 58 278]
[2] Zang J C, Zheng K, Zou Y L, Wu J P, Song Y R, Liu G Q, Feng B H, Zhang D X, Liu Y L, Zhu K 2010 Acta Phys. Sin. 59 609(in Chinese) [臧竞存、郑 锴、邹玉林、吴敬朋、宋晏蓉、刘国庆、冯宝华、张东香、刘玉龙、朱 恪 2010 59 609]
[3] Chen G X, Zhang Q Y, Zhao C, Shi D M, Jiang Z H 2010 Acta Phys. Sin. 59 1321(in Chinese) [陈敢新、张勤远、赵 纯、石冬梅、姜中宏 2010 59 1321]
[4] Vodchits A I, Orlovich V A, Apanasevich P A, Basiev T T, Zverev P G 2007 Opt. Mater. 29 1616
[5] Huang J P, H. S. Luo, Zhou P L, Yu X B, Li Y K 2007 J. Lumin. 126 881
[6] Ryu J H, Bang S Y, Kim W S, Park G S, Kim K M, Yoon J W, Shim K B, Koshizaki N 2007 J. Alloys Compd. 441 146
[7] Longo V M, Orhan E, Cavalcante L S, Porto S L, Espinosa J W M, Varela J A, Longo E 2007 Chem. Phys. 334 180
[8] Bhargava R N, Gallagher D, Hong X, Nurmikko A 1994 Phys. Rev. Lett. 72 416
[9] Bhargava R N 1996 J. Lumin. 70 85
[10] Jia M L, Zhang J H, Lu S Z, Sun J T, Luo Y S, Ren X G, Song H W and Wang X J 2004 Chem. Phys. Lett. 384 193
[11] Song H W, Chen B J, Peng H S, Zhang J S 2002 Appl. Phys. Lett. 81 1776
[12] Zhao C H,Zhang B P, Shang P P 2009 Chin. Phys. B 18 5539
[13] Kodaira C A, Brito H F, Malta O L, Serra O A 2003 J. Lumin. 101 11
[14] Kodaira C A, Brito H F, Felinto M C F C 2003 J. Solid State Chem. 171 401
[15] Jia P Y, Liu X M, Yu M, Luo Y, Fang J, Lin J 2006 Chem. Phys. Lett. 424 358
[16] Pullar R C, Farrah S, Alford N McN 2007 Journal of the European Ceramic Society 27 1059
[17] Kodaira C A, Brito H F, Teotonio E E S, Felinto M C F C, Malta O L, Brito G E S 2004 J. Braz. Chem. Soc. 15 890
[18] Wang Y G, Ma J F, Tao J T, Zhu X Y, Zhou J, Zhao Z Q, Xie L J, Tian H 2007 Ceramics International 33 1125
[19] Fu H B,.Pan C S, Zhang L W, Zhu Y F 2007 Mater. Res. Bull. 42 696
[20] Di W H, Wang X J, Chen B J, Lu S Z, Zhao X X 2005 J. Phys. Chem. B 109 13154
[21] He C, Guan Y F, Yao L Z, Cai W L, Lia X G, Yao Z 2003 Mater. Res. Bull. 38 973
[22] Huang Y H, Jiang D L, Zhang J X, Lin Q L 2010 Acta Phys. Sin. 59 300(in Chinese) [黄毅华、江东亮、张景贤、林庆玲 2010 59 300]
[23] Jiang B X, Huang T D, Wu Y S, Liu W B, Pan Y B, Feng T, Yang Q H 2008 Chin. Phys. B 17 3407
[24] Judd B R 1962 Phys. Rev. 127 750
[25] Ofelt G S 1962 J. Chem. Phys. 37 511
[26] Ray S, Pramanik P, Singha A, Roy A 2005 J. Appl. Phys. 97 094312
[27] Nishimura G, Kushida T 1988 Phys. Rev. B 37 9075
[28] Reisfeld R, Greenberg E, Brown R N, Drexhage M G, Jφrgensen C K 1983 Chem. Phys. Lett. 95 91
[29] Tian Y, Qi X H, Wu X W, Hua R N, Chen B J 2009 J. Phys. Chem. C 113 10767
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