Abstract:Er3+-doped zinc oxide nanocrystalline powders were successfully prepared by chemical precipitation method. Photoluminescence spectrum (PL), photoluminescence spectrum excitation(PLE) and X-ray diffraction pattern(XRD) of the nanocrystalline ZnO∶Er3+ with excitation wavelength 365 nm were measured at room temperature. XRD pattern indicates that nanocrystalline ZnO∶Er3+ has a hexagonal wurtzite structure and polycrystallining. The mean grain size of nanocrystalline ZnO∶Er3+ was calculated with Debye-Scherrer formula. The luminescence process of Er3+-doped zinc oxide nanocrystalline was investigated by using PL and PLE. Emissions of S3/2(550 nm),2H11/2(521 nm) and 4F5/2(456 nm)of Er3+ ions were observed in wide visible band of ZnO. By analyzing the spectrum the effect of Er3+-doping on the luminescence of ZnO was studied. An energy transfer from excited states of ZnO hosts to doping Er3+ ions centers was disclosed by the fact that photoluminescence intensity maximum of nanocrystalline ZnO∶Er3+changed with the doping concentration of Er3+.
Key words:ZnO∶Er3+ nanocrystalline;Photoluminescence;Energy transfer
[1] Bhargave R N, Gallagher D, Hong X, et al. Phys. Rev. Lett., 1994, 72: 416. [2] Bhargave R N, Gallagher D, Welker T. J. Lumin., 1994, 60 & 61: 275. [3] CAO Li-xin, HUANG Shi-hua, REN Shan-ling, et al(曹立新,黄世华,任山令, 等). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2003, 23(3): 451. [4] LIU Shu-man, LIU Feng-qi, GUO Hai-qing, et al(刘舒曼,刘峰奇,郭海清, 等). Chinese Journal of Semiconductors(半导体学报), 2001, 22(4): 418. [5] LIU Shu-man, LIU Feng-qi, ZHANG Zhi-hua, et al(刘舒曼,刘峰奇,张志华, 等). Acta Physica Sinica(物理学报), 2000, 49(11): 2307. [6] YANG Xiu-jian, SHI Chao-shu, XU Xiao-liang(杨秀健,施朝淑,许小亮). Acta Physica Sinica(物理学报), 2002, 51(12): 2871. [7] LI Qing-fu, HUANG Shi-hua, LIU Shu-man, et al(李庆福,黄世华,刘舒曼, 等). Laser of Infrared(激光与红外), 2003, 33(2): 145. [8] ZHANG Xi-tian, GAO Hong, ZHANG Wei-li, et al(张喜田,高 红,张伟力, 等). Journal of Synthetic Crystals(人工晶体学报), 2001, 30(4): 389. [9] SONG Guo-li, LIANG Hong, SUN Kai-xia(宋国利,梁 红,孙凯霞). Acta Photonica Sinica(光子学报), 2004, 33(4): 485. [10] Lü Shu-chen, SONG Guo-li, ZHANG Jia-hua, et al(吕树臣,宋国利,张家骅,等). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2003, 23(6): 1049. [11] XU Peng-shou, SUN Yu-ming, SHI Chao-shu, et al(徐彭寿, 孙玉明, 施朝淑, 等). Science in China(A)(中国科学A), 2001, 31(4): 358. [12] Lü Shu-chen, SONG Guo-li, ZHANG Jia-hua, et al(吕树臣,宋国利,张家骅,等). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2005, 25(12): 1920. [13] WANG Wen-hua, CHENG Jian-bo, ZHU Hong-jie, et al(王文华,程建波,祝洪杰,等). Spectroscopy and Spectral Analysis(光谱学与光谱分析),2006,26(6):991.