Tm3+ Concentration Dependence of Upconversion Intensity of YLiF4:Er3+,Tm3+,Yb3+
ZHAO Su-ling,HOU Yan-bing,XU Zheng,PEI Xiao-jiang
Institute of Optoelectronics Technology, Key Laboratory of Luminescence and Optical Information, Ministry of Education, Beijing Jiaotong University, Beijing 100044, China
Abstract:A series of YLiF4:Er3+,Tm3+,Yb3+ samples were synthesized by hydrothermal method. The concentrations of Er3+ and Yb3+ were 1 mol% and 1.5 mol%, respectively. Tm3+ concentration changed from 2 to 8 mol%. The absorption of Er3+,Tm3+ and Yb3+ were observed, and the absorption of Tm3+ increased along with the increase in Tm3+ concentration. The color of upconversion luminescence of YLiF4:Er3+,Tm3+ and Yb3+ excited by 980 nm was white when Tm3+ concentration was low. The blue light resulted from the transition of 1G4→3H6 of Tm3+,the green light from the transition of 4S3/2 (2H11/2)→4I15/2 of Er3+,and the red light from the transitions 1G4→3F4 of Tm3+ and 4F9/2→4I15/2 of Er3+. All the upconversion intensities decreased when Tm3+ concentration increased, but the relative intensity decrease was different due to the interaction between Er3+ and Tm3+.
[1] Martín I R, Rodríguez V D, Lavín V,et al. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 1999, 55(5): 941. [2] Malinowski M, Frukacz Z, Szuflinska M, et al. Journal of Alloys and Compounds, 2000, 300-301: 389. [3] Méndez-Ramos J, Lavín V, Martín I R, et al. Journal of Alloys and Compounds, 2001, 323-324: 753. [4] Zhang X X, Hong P, Bass M, et al. Phys. Rev. B, 1995, 51: 9298. [5] Xie P, Gosnell T R. Opt. Lett., 1995, 20: 1014. [6] Jose Expedito C Silva, Gilberto F de Sa, Petrus A Santa-Gruz. Journal of Alloys and Compounds, 2001, 323-324: 336. [7] Silva J E C da, Sa G F de, Santa-Gruz P A. Journal of Alloys and Compounds, 2002, 344: 260. [8] Lewis J D, Verber C M, McGhee R B. IEEE Transaction on Electron Devices, 1971, Ed-18(9): 724. [9] Downing E, Hesselink L, Raston J, et al. Science, 1996, 273: 1185. [10] Jose Expedito Silva, Gilberto F de Sa, et al. Journal of Alloys and Compounds, 2002, 344: 260. [11] ZHAO Su-ling, XU Zheng, PEI Xiao-jiang (赵谡玲,徐 征,裴晓将). Spectroscopy and Spectral Analysis(光谱学与光谱分析),2005, 25(12): 1933. [12] PEI Xiao-jiang, HOU Yan-bing, ZHAO Su-ling, et al(裴晓将,侯延冰,赵谡玲, 等). J. of Chinese Rare Earth Society(中国稀土学报), 2004, 22(3): 318. [13] HUANG Shi-hua(黄世华). Dynamics of Ion Center Luminescence(离子中心的发光动力学). Beijing: Science Press(北京: 科学出版社), 2002. 77.