用沉淀法制备了YAG:Ce纳米荧光粉. 用X射线粉末衍射仪 (XRD)、扫描电子显微镜 (SEM) 对粉体煅烧过程的相变和形貌进行了表征. 研究了80～400K范围内, YAG:Ce纳米荧光粉发光和衰减的温度依赖特性. 结果表明, 前躯体由纳米颗粒组成. 900℃煅烧时, 粉体由非晶态直接转变为YAG相. YAG:Ce的发光强度随温度的升高而减弱. YAG:Ce纳米荧光粉的衰减包含两个指数项, 长时间项反映了体相Ce3+的荧光衰减, 随着温度的升高不断减小. 短时间项反映了表面Ce3+的荧光衰减, 随着温度的升高呈下降趋势, 由于受到表面效应的影响, 中间出现小幅的阶跃.
Ce-doped Y3Al5O12(YAG:Ce) nanophosphor was synthesized by the co-precipitation method. X-ray powder diffraction (XRD), Scanning electron microscope (SEM) were used to characterize the powders. The temperature dependences of luminescence and decay time of YAG:Ce nanophosphor were investigated in the temperature range of 80-400K. The luminescence intensity decreases with the increase of temperature, which is caused by the increase of the non-radiative relaxation rate. The decay of YAG:Ce contains two exponential terms, the long component presents decay of Ce3+ in the body, the short component reflects decay of Ce3+ on the surface. The long component decreases with the increase of temperature, while the short component shows intricate behavior, which results from effect of surface.
参考文献
| [1] | Haranath D, Chander H, Sharma P, et al. Appl. Phys. Lett., 2006, 89 (17): 173118-1-3. [2] Nakamura S, Mukai T, Senoh M. Appl. Phys. Lett., 1994, 64 (13): 1687-1689. [3] Andrievski R A. J. Mater. Sci., 1994, 29 (3): 614-631. [4] Ludziejewski T, Noszynski M, Kapusta M, et al. Nucl. Instrum. Methods Phys. Res. Sect. A, 1997, 398 (2-3): 287-294. [5] Zych E, Brecher C, Wojtowicz A, et al. J. Lumin., 1997, 75 (3): 193-203. [6] 陈积阳, 施 鹰, 施剑林(CHEN Ji-Yang, et al). 无机材料学报(Journal of Inorganic Materials), 2004, 19 (6): 1260-1266. [7] 王宏志, 高 濂(WANG Hong-Zhi, et al). 无机材料学报(Journal of Inorganic Materials), 2001, 16 (4): 630-634. [8] Apte P, Burke H, Pickup H. J. Mater. Res., 1992, 7 (3): 706-711. [9] Abell J S, Harris I R, Cockayne B, et al. J. Mater. Sci., 1974, 9 (4): 527-537. [10] 刘如熹, 石景仁. 中国稀土学报, 2002, 20 (6): 495-501. [11] Blasse G, Grabmaier B C. Luminescent Materials, 1994, Berlin: Springer-Verlag. 45. [12] Blasse G, Bril A. Appl. Phys. Lett., 1967, 11 (2): 53-55. [13] Hamilton D S, Gayen S K, Pogatshnik G J, et al. Phys. Rev. B, 1989, 39: 8807-8815. [14] Weber M J. Solid State Commun., 1973, 12 (7): 741-744. [15] Guo H, Yin M, Dong N, et al. Appl. Surf. Sci., 2005, 243 (1-4): 245-250. [16] Pidol L, Khan-Harari A, Viana B, et al. J. Phys. Condens. Matter, 2003, 15 (12): 2091-2102. [17] 陈俊锋, 李 贇, 宋桂兰(CHEN Jun-Feng, et al). 无机材料学报(Journal of Inorganic Materials), 2007, 22 (1): 25-29. [18] Zych E, Brecher B. J. Alloys Compd., 2000, 300 (1-2): 495-499. [19] Lempicki A, Bartram R H. J. Lumin., 1999, 81 (1): 13-20. [20] Zych E, Brecher C, Glodo J. J. Phys. Condens. Matter., 2000, 12 (8): 1947-1958. |
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