ZnAl_2O_4∶Tb^(3+)荧光粉的合成、结构及其光学性能研究  

Synthesis,Structure and Optical Property of ZnAl_2O_4∶Tb^(3+) Phosphor

作　　者：雷志高[1] 常天赐 崔佳萌[1] 陈骏飞[1] 肖颖[2] 孟大维[1] 邹锴[3] 吴秀玲[1] 

机构地区：[1]中国地质大学材料与化学学院,湖北武汉430074 [2]武汉科技大学城市学院,湖北武汉430083 [3]华中科技大学管理学院,湖北武汉430074

出　　处：《发光学报》2013年第11期1446-1450,共5页Chinese Journal of Luminescence

基　　金：国家自然科学基金(41172051;40872039);全国大学生创新训练计划(111049113;201310491012);中国地质大学大学生自主创新资助计划(1310491B01);李四光创新人才计划(2012-18);英才工程计划(2012-K25;K26)资助项目

摘　　要：通过溶胶-凝胶法制备出不同Tb3+掺杂浓度和不同二次煅烧温度下的ZnAl2O4∶Tb3+荧光粉,并利用X射线衍射(XRD)和荧光光谱等对样品进行了表征。由XRD结果可知,当Tb3+掺杂的摩尔分数不大于9%,二次煅烧温度在600℃以上时,所得粉体为结晶性良好的尖晶石相。在紫外光激发下,ZnAl2O4∶Tb3+荧光粉的发射光谱由位于488 nm(5D4→7F6)、542 nm(5D4→7F5)、587 nm(5D4→7F4)和621.5 nm(5D4→7F3)的4个发射峰组成。研究发现,Tb3+的掺杂浓度和二次煅烧温度对样品发光强度有着重要影响,当Tb3+的摩尔分数为5%,二次煅烧温度为900℃时,ZnAl2O4∶Tb3+荧光粉的发光最强,继续增加Tb3+掺杂浓度或提高煅烧温度,分别会出现浓度猝灭和温度猝灭现象。The ZnAl2O4∶ Tb3 +phosphor powders were synthesized by sol-gel method with different doping concentrations of Tb3 +and secondary calcination temperatures. Then they were characterized by X-ray diffraction( XRD) and photoluminescence( PL). The XRD patterns show that the pure spinel phase of high crystallinity can be obtained when the mole fraction of Tb3 +is less than 9% and the secondary calcination temperature exceeds 600 ℃. Under the excitation of ultraviolet light,the emission spectra of ZnAl2O4∶ Tb3 +phosphor consists of four peaks locating at 488 nm(5D4→7F6),542 nm(5D4→7F5),587 nm(5D4→7F4),and 621. 5 nm(5D4→7F3). The influence of Tb3 +concentration and secondary calcination temperature on the luminescence intensity was significant.The photoluminescence spectra intensity of ZnAl2O4∶ Tb3 +is the strongest when the mole fraction of Tb3 +is 5% and the secondary calcination temperature is 900 ℃. When the mole fraction of Tb3 +and the secondary calcination temperature increase excessively,concentration quenching and temperature quenching appear,respectively.

关 键 词：ZNAL2O4 TB3+ 荧光粉 结构 光致发光 

分 类 号：O482.31[理学—固体物理]