溶胶-凝胶法制备Li_2ZnSiO_4∶Sm^(3+)红色荧光粉  

Preparation of Red Phosphor Li_2ZnSiO_4∶Sm^(3+) by Sol-gel Method

作　　者：何晓林[1] 杨定明[1] 廖其龙[1] 代亚薇 

机构地区：[1]西南科技大学四川省非金属复合与功能材料重点实验室-省部共建国家重点实验室培育基地,绵阳621010

出　　处：《人工晶体学报》2014年第3期532-536,共5页Journal of Synthetic Crystals

基　　金：国家重点基础研究发展计划(973计划)(2012CB722707);西南科技大学大学生创新训练计划(12xjjx88)

摘　　要：采用溶胶-凝胶法合成Li2ZnSiO4∶Sm3+红色荧光粉,并对其发光性质进行了研究。结果表明:所得样品为正方晶系,呈柱状颗粒。用566 nm、604 nm和651 nm作为监控波长,激发峰位置和形状并未发生改变,但峰的强度有所差别。激发主峰位于408 nm(6H5/2→4L13/2)处。在408 nm激发下,样品的发射光谱由四个荧光发射峰构成,分别位于566 nm、604 nm、651 nm和710 nm,对应于Sm3+特征跃迁4G5/2→6HJ(J=5/2,7/2,9/2,11/2),发射主峰为604nm,是一种适用于白光LED的红色荧光粉,当Sm3+的掺杂浓度为2.5%,发光强度最大。Abstract：The Li2ZnSiO4： Sm2＋ red phosphor was synthesized by sol-gel method, and its luminescent properties were studied. The results show that the sample belongs to tetragonal crystal system which is columnar particles. With 566 nm, 604 nm and 651 nm as wavelength monitoring respectively, the location of excitation peak doesn ＇t change, but the intensity of the peak is different. The maximum excitation peak of Li2ZnSiO4： Sm3~ is 408 nm （6Hs/z→4L13/2）. The emission spectrum consists of four emission bands under excitation at 408 nm. The emission peaks are located at 566 nm, 604 nm, 651 nm and 710 nm, corresponding to the typical transitions of Sm3＋ 4 G5/2→6HJ （j = 5/2,7/2,9/2,11/2 ）, and the strongest one is at 604 nm. It is a very appropriate red emitting phosphor for white light-emitting diodes. The optimal content of Sm3＋ is about 2.5%.

关 键 词：溶胶-凝胶法 Li2ZnSiO Sm3+ 红色荧光粉 发光性质 

分 类 号：O482.31[理学—固体物理]