Quantum Efficiency of the 5D0 Level of Eu3+ at C2 Site in Cubic Nanocrystalline Y2O3
MENG Qing-yu1, 2, CHEN Bao-jiu1*, XU Wu1, 3, WANG Xiao-jun1, XIE Yi-hua1, LAI Hua-sheng1, 4, DI Wei-hua1, REN Guo-zhong1, ZHAO Xiao-xia1, YANG Yan-min1
1. Key Laboratory of Excited State Processes, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China 2. Graduate School of Chinese Academy of Sciences, Beijing 100039, China 3. University of Science and Technology of China, Hefei 230026, China 4. Jiangxi South Rare-Earth High-Tech. Co., Ltd. Ganzhou 341000, China
Abstract：In the present the authors are trying to work out how the quantum efficiency depends on the nanocrystalline size. Cubic nanocrystalline Y2O3:Eu3+ samples were prepared by chemical self-combustion. The bulk Y2O3:Eu3+ was obtained by annealing the nanocrystalline at 1 000 ℃ for 2 h. The emission spectra, XRD and fluorescence decay showed that the emission intensities are increased and fluorescence decay becomes slow with an increase in particle diameter of the samples. Two routes were used to estimate the quantum efficiency of the 5D0 level of Eu3+ at C2 site. The quantum efficiencies of 5D0 level of Eu3+ at C2 site in the samples depend on the nanocrystalline sizes. Finally, a detailed discussion about these two approaches for estimating the quantum efficiencies was made.
孟庆裕1，2,陈宝玖1*,许武1，3,王晓君1,谢宜华1, 赖华生1，4,狄伟华1,任国仲1,赵晓霞1,杨艳民1. 立方相Y2O3:Eu纳米晶中C2格位Eu3+的5D0能级量子效率[J]. 光谱学与光谱分析, 2006, 26(08): 1377-1381.
MENG Qing-yu1, 2, CHEN Bao-jiu1*, XU Wu1, 3, WANG Xiao-jun1, XIE Yi-hua1, LAI Hua-sheng1, 4, DI Wei-hua1, REN Guo-zhong1, ZHAO Xiao-xia1, YANG Yan-min1. Quantum Efficiency of the 5D0 Level of Eu3+ at C2 Site in Cubic Nanocrystalline Y2O3. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2006, 26(08): 1377-1381.
[1] LIU Chun-xu, ZHANG Jia-hua, Lü Shao-zhe, et al(刘春旭，张家骅，吕少哲，等). Acta Physica Sinica(物理学报), 2004, 53(11): 3945. [2] Bhargava R N, Gallagher D, Hong X, et al. Phys. Rev. Lett., 1994, 72: 416. [3] Bhargava R N. J. Lumin., 1996, 70: 85. [4] PEI Yi-hui, LIU Xing-ren(裴轶慧，刘行仁). Chinese J. Lumin.(发光学报), 1996, 17(1): 52. [5] CHEN Bao-jiu, WANG Hai-yu, HUANG Shi-hua(陈宝玖，王海宇, 黄世华). Acta Optica Sinica(光学学报)，2001, 21(6): 762. [6] Song H W, Chen B J, Peng H S, et al. Appl. Phys. Lett., 2002, 81: 1776. [7] LI Yu-lin(李玉林). Chinese Rare Earths(稀土), 1999, 20: 2. [8] Ranson R M, Evangelou E, Thomas C B. Appl. Phys. Lett., 1998, 72(21): 2663. [9] Jia M L, Zhang J H, Lu S Z, et al. Chemical Physics Letters, 2004, 384: 193.
