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The Er3+/Yb3+ codoped TiO2 films prepared by magnetron sputtering can emit the green light at 490 nm and the red light at 670 nm by using a 980 nm diode laser irradiation. The emission intensity of upconversion is influenced by ErxYb2-xTi2O7 crystal and concentration of Er3+/Yb3+. The experiment shows that an appropriate codoping proportion of Er3+/Yb3+ brings a notable enhancement of upconversion luminescence intensity. Er3+ plays a main role in the upconversion luminescence, and the sensitized ion Yb3+can greatly improve the efficiency of upconversion. The TiO2 film prepared by magnetron sputtering has a small density of phonon states, thus it inhibits the process of non-radiative transitions, which leads to the formation of green light at 490 nm and the intensity of red light being greater than green light.
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Keywords:
- upconversion luminescence /
- TiO2 films /
- Er3+/Yb3+ codoped /
- sputtering
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[29] Tsang W S, Yu W M, Mak C L, Tsui W L, Wong K H, Hui H K 2002 J. Appl. Phys. 91 1871
[30] Jiang S B, Luo T, Hwang B, Smekatala F, Seneschal K, Lucas J, Peyghambarian N 2000 J. Non-Cryst. Solids. 263-264 364
[31] Yang Z M, Zhang Q Y, Liu Y H, Jiang Z H 2005 Acta Phys. Sin. 54 2013 (in Chinese) [杨中民, 张勤远, 刘粤惠, 姜中宏 2005 物理学报 54 2013]
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[1] Scheps R 1996 Prog. Quant. Electron. 20 271
[2] Kawsny M, Mierczyk Z, Stepied R, Jedrzejewski K 2000 J. Alloys Compd. 300 341
[3] Zheng J, Tao Y L, Wang W, Ma Z H, Zuo Y H, Cheng B W, Wang Q M 2012 J. Lumin. 132 2341
[4] Shalav A, Richards B S, Green M A 2007 Sol. Energy Mater. Sol. Cells 91 829
[5] Xiao S G, Yang X L, Liu Z W 2002 Chin. Phys. B 11 188
[6] Chen X B, Song Z F 2004 Chin. Phys. B 13 115
[7] Chen X B, Liu K, Zhuang J, Wang G W, Chen C T 2002 Acta Phys. Sin. 51 690 (in Chinese) [陈晓波, 刘凯, 庄健, 王国文, 陈创天 2002 物理学报 51 690]
[8] Matsuura D 2002 Appl. Phys. Lett. 81 4526
[9] Thrash R J, Johnson L F 1994 J. Opt. Soc. Am. B: Opt. Phys. 11 881
[10] Mita Y, Wang Y, Shionoya S 1993 Appl. Phys. Lett. 62 802
[11] Wang J Y, Guo W L, Lin Z M, Song G Z, Zhao L J, Zhang C Z, Zhang G Y 2002 Acta Phys. Sin. 51 1861 (in Chinese) [王吉有, 国伟林, 林志明, 宋广智, 赵丽娟, 张存洲, 张光寅 2002 物理学报 51 1861]
[12] Yang H G, Dai Z W, Zu N N 2007 Chin. Phys. B 16 1650
[13] Lei H B, Yang Q Q, Zhu J L, Gao J H, Wang H J, Wang Q M 1998 Chin. Phys. Lett. 15 72
[14] Desirena H, De la Rosa E, Shulzgen A, Shabet S, Peyghambarian N 2008 J. Phys. D: Appl. Phys. 41 5102
[15] Georgescu S, Voiculescu A M, Matei C, Stefan A G, Toma O 2012 ROMOPTO 2012: Tenth Conference on Optics: Micro-to Nanophotonics Ⅲ Bucharest, Romania, September 03, 888204
[16] Zheng L J, Li Y X, Liu H L, Xu W, Zhang Z G 2013 Acta Phys. Sin. 62 240701 (in Chinese) [郑龙江, 李雅新, 刘海龙, 徐伟, 张治国 2013 物理学报 62 240701]
[17] Shang Q K, Yu H, Kong X G, Wang H D, Wang X, Sun Y J, Zhang Y L, Zeng Q H 2008 J. Lumin. 128 1211
[18] Auzel F, Goldner P 2001 Opt. Mater. 16 93
[19] Chen S Y, Ting C C, Hsieh W F 2003 Thin Solid Films. 434 171
[20] Yang Z W, Zhu K, Song Z G, Zhou D C, Yin Z Y, Qiu J B 2011 Solid State Commun. 151 364
[21] Qin G S, Qin W P, Chen B J, Wu C F, L S Z, Huang S H 2001 J. Chin. Soc. Rare Earths 19 526 (in Chinese) [秦冠仕, 秦伟平, 陈宝玖, 吴长峰, 吕少哲, 黄世华 2001 中国稀土学报 19 526]
[22] Ji T H, Liu Y, Zhao H, Du H Y, Sun J Y, Ge G L 2010 J. Solid State Chem. 183 584
[23] Guo Y, Zhang L, Hu L, Chen N K, Zhang J 2013 J. Lumin. 138 209
[24] Jenouvrier P, Boccardi G, Fick J, Jurdyc A M, Langlet M 2005 J. Lumin. 113 291
[25] Patra A, Friend C S, Kapoor R, Prasad P N 2003 Chem. Mater. 15 3650
[26] Zhao L J, Sun L D, Xu J J, Zhang G Y 2001 Acta Phys. Sin. 50 63 (in Chinese) [赵丽娟, 孙聆东, 许京军, 张光寅 2001 物理学报 50 63]
[27] Bai L Y, Su X Y, Lei M K 2006 Int. J. Inorg. Mater. Int. 21 1085 (in Chinese) [白凌云, 苏显云, 雷明凯 2006 无机材料学报 21 1085]
[28] Pan Z, Morgan S H, Loper A, King V, Long B H, Colins W E 1995 J. Appl. Phys. 77 4688
[29] Tsang W S, Yu W M, Mak C L, Tsui W L, Wong K H, Hui H K 2002 J. Appl. Phys. 91 1871
[30] Jiang S B, Luo T, Hwang B, Smekatala F, Seneschal K, Lucas J, Peyghambarian N 2000 J. Non-Cryst. Solids. 263-264 364
[31] Yang Z M, Zhang Q Y, Liu Y H, Jiang Z H 2005 Acta Phys. Sin. 54 2013 (in Chinese) [杨中民, 张勤远, 刘粤惠, 姜中宏 2005 物理学报 54 2013]
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