Al3+掺杂浓度对CaTiO3:Eu3+荧光粉发光性能的影响  

Influence of Al3+ Doping Concentration on Luminescence Properties of CaTiO3:Eu3+ Phosphor

作　　者：裴康宏 李苏洪 何春梅 李孺 杨建会[1] 范强[1] PEI Kanghong;LI Suhong;HE Chunmei;LI Ru;YANG Jianhui;FAN Qiang(School of Physics and Electronic Engineering,Leshan Normal University,Leshan Sichuan 614000,China)

机构地区：[1]乐山师范学院物理与电子工程学院

出　　处：《乐山师范学院学报》2019年第12期24-28,共5页Journal of Leshan Normal University

基　　金：四川省大学生创新创业训练项目“激活剂结构环境对红色荧光粉发光性能的影响”(201810649110);四川省教育厅项目“高效SnSe基热电材料的多晶制备、性能及应用研究”(18CZ0030);乐山师范学院科技资助项目“新型类金刚石热电材料AgGaS_2的热导率调控”(ZZ201817);乐山市科技局项目“新型热电材料SnSe的多晶制备与性能研究”(19GZD006)

摘　　要：采用高温固相法合成了Ca0.95Ti1-xO3:0.05Eu^3+,xAl^3+(x=0,0.01,0.02,0.03,0.04,0.05)(CTE)系列荧光粉,通过XRD、荧光光谱分析等测试方法,研究了Al^3+掺杂浓度对CTE系列荧光粉的物相结构和发光性能的影响。XRD结构分析表明,制备的系列荧光粉具有较好的结晶性能,Al^3+掺杂对荧光粉的晶体结构影响较小;激发光谱结果表明,Al^3+掺杂CTE荧光粉可被紫外光(397nm)有效激发,发射出615nm的红光;当Al^3+掺杂浓度x=0.04时,相对发光强度在未掺杂Al^3+的基础上提高了2.5倍。适量的Al^3+掺杂可改善CTE荧光粉的晶体环境,提高CTE荧光粉的能量传递效率,有效改善CTE荧光粉的发光性能。A series phosphor sample of Ca0.95TiO3:0.05Eu^3+ ,xAl^3+ (CTE,x=0,0.01,0.02,0.03,0.04,0.05)were synthesized by solid state method.The influence of Al^3+ -doping concentration on crystal structure and luminescence properties of CTE phosphor was investigated by using XRD and fluorescence analysis.XRD results show that the papered CTE phosphors have good crystallization and are litter influenced by the Al^3+ -doping concentration.The as-prepared phosphors can be effectively excited by the near UV light(397 nm).There is a main emission peaks located at 615 nm red light.The highest emission intensity of CTE phosphor,2.5 times stronger than the Al^3+ -doping without sample,is obtained when Al^3+ -doping concentration is about x=0.04,which suggests the suitable Al^3+ -doping concentration will beneficial for the crystal environment,energy transfer efficiency and luminescence properties of CTE phosphor.

关 键 词：钛酸钙 红色荧光粉 高温固相法 铝掺杂 

分 类 号：O482.31[理学—固体物理]