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The Ca and Ba co-doped long afterglow phosphors Sr0.6Ba0.2Ca0.2Al2O4 ∶Eu2+0.01, Dy3+0.02 and only Ba doped phosphors Sr0.6Ba0.4Al2O4 ∶Eu2+0.01, Dy3+0.02 are synthesized by a high temperature solid-state reaction method. The phase structures of the phosphors are characterized by x-ray diffraction, showing that the crystal structures of samples are hexagonal. Photoluminescence spectra show that Eu2+ ion acts as the only luminescence center in sample,and Sr0.6Ba0.2Ca0.2Al2O4 ∶Eu2+, Dy3+ display higher luminescent intensities due to the higher concentration of Eu2+ ions in the host crystal lattice. The decay characteristics of phosphors show that Sr0.6Ba0.2Ca0.2Al2O4 ∶Eu2+, Dy3+exhibit higher intensities in the initial afterglow process and longer afterglow time. The measurement of thermoluminescence reveals that the concentrations and depth of traps can be increased by Ca and Ba co-doping in Sr0.6Ba0.4Al2O4 ∶Eu2+, Dy3+ phosphor.
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Keywords:
- long afterglow /
- strontium aluminate /
- rare-earth doped /
- traps
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[1] Yang Z P, Liu Y F 2006 Acta Phys.Sin.55 4946 (in Chinese) [杨志平、刘玉峰 2006 55 4946]
[2] Liao Q R, Zhuang W D, Xia T, Liu R H, Hu Y S, Teng X M, Liu Y H 2009 Acta Phys.Sin.58 2776(in Chinese)[廖秋荣、庄卫东、夏 天、刘荣辉、胡运生、滕晓明、刘元红 2009 58 2776]
[3] Setlur A A, Srivastava A M, Pham H L, Hannah M E, Happek U 2008 J. Appl. Phys. 103 053513
[4] 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]
[5] Wang Z J, Yang Z P, Guo Q L, Li P L, Fu G S 2009 Chin. Phys. B 18 2068
[6] Grace D M, Eric D R, Shen H E, Nathaniel T W, Volkmar D, Michael W 2009 J. Appl. Phys. 105 053101
[7] Yang Z P, Liu Y F, Wang L W, Yu Q M, Xiong Z J, Xu X L 2007 Acta Phys.Sin.56 546 (in Chinese)[杨志平、刘玉峰、王利伟、余泉茂、熊志军、徐小岭 2007 56 546]
[8] Sun J Y, Du H Y 2003 Solid Luminescent Materials (Beijing:Chemical Industry Press) (in Chinese) [孙家跃、杜海燕 2003 固体发光材料(北京:化学工业出版社)]
[9] Qiu J , Miura K, Inouye H 1998 Appl. Phys. Lett. 73 1763
[10] Kowatari M, Koyama D, Satoh Y, Iinuma K, Uchida S 2002 Nucl. Instrum. Methods Phys. Res. A 480 431
[11] Shi W S, Yamada H, Nishikubo K, Kusaba H, Xu C N 2004 J. Electrochem. Soc. 151 H97
[12] Peng T, Yang H, Pu X, Hu B, Jiang Z, Yan C 2004 Mater. Lett. 58 352
[13] Yu X, Zhou C, He X, Peng Z, Yang S 2004 Mater. Lett. 58 1087
[14] Sanchez-Benitez J, de Andres A, Marchal M, Cordoncillo E, Regi M V, Escribano P 2003 J. Solid Chem. 171 273
[15] Tannka K, Fujita K, Taniguchi T, Hirao K, Ishihara T 2000 J. Appl. Phys. 88 4069
[16] Wu Q L, Liu Z, Jiao H 2009 Physica B 404 2499
[17] Henderson C M B, Taylor D 1982 Mineral. Mag. 45 111
[18] Matsuzawa T, Aoki Y, Takeuchi M 1996 J. Electrochem. Soc. 143 2670
[19] Xie W, Wang Y H, Hu Y H, Wu H Y, Deng L Y 2010 Acta Phys.Sin.59 418 (in Chinese)[谢 伟、王银海、胡义华、吴浩怡、邓柳咏 2010 59 418]
[20] Wang D, Yin Q R, Li Y X, Wang M Q 2002 J. Lumin. 97 1
[21] Ma M X, Zhu D C, Tu M J 2009 Acta Phys.Sin.58 6512(in Chinese)[马明星、朱达川、涂铭旌 2009 58 6512]
[22] Katsumata T, Toyomane S, Tonegawa A, Kanai Y, Kaneyama U 2002 J. Cryst. Growth 361 237
[23] Zhang C X, Tang Q, Luo D L 2002 Acta Phys.Sin.51 2881 (in Chinese) [张纯祥、唐 强、罗达玲 2002 51 2881]
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