Sn^(4+)掺杂对荧光粉LaGaO_3∶Tm^(3+)发光性能的影响  

Effects of Sn^(4+) on Luminescent Properties of LaGaO_3: Tm^(3+) Phosphors

作　　者：李林 赵静 

机构地区：[1]新乡市质量技术监督检验测试中心,河南新乡453000 [2]新乡市牧野区卫生监督所,河南新乡453000

出　　处：《广东化工》2016年第16期104-105,共2页Guangdong Chemical Industry

摘　　要：通过高温固相反应制备Sn^(4+)掺杂LaGaO_3∶Tm^(3+)荧光粉,分别采用XRD和光致发光光谱对其物相和发光性能进行表征。结果表明:Sn^(4+)和Tm^(3+)均作为掺杂离子进入到LaGaO_3的晶格中。样品的激发光谱均有263 nm、291 nm和360 nm锐利激发峰组成,其主峰为360 nm。在360 nm激发下,样品均在450~470 nm间出现Tm^(3+)的特征跃迁~1D_2→~3F_4。相对于LaGaO_3∶Tm^(3+),样品LaGaO_3∶Tm^(3+),Sn^(4+)的发光效率、辐射效率和主发射峰强度分别提高115%、127%和150%,其最佳掺杂量为1%。样品LaGaO_3∶Tm^(3+),Sn^(4+)可作为蓝色荧光粉可应用于UV-LEDs器件中。The Sn^4＋ doped-LaGaO3 ： Tm^3＋ phosphors were prepared using high-temperature solid phase reaction. Its structure and luminescence property were characterized by X-Ray powder diffraction （XRD） and Photoluminescence spectrum, respectively. The results show that all the Sn^4＋ and Tm^3＋ ions were introduced into LaGaO3 lattice. Excitation spectrum showed some excitation peaks at 263 nm, 291 nm and 360 nm, with main peak at 360 nm. Under excitation at 360 nm, all the phosphors exhibited characteristic transition ^1D2→^3F4 of Tm^3＋ at 450-470 nm. The radiant efficiency, luminous efficiency and main emission peak intensity of LaGaO3 ： Tm^3＋, Sn^4＋ phosphors were 115 %, 127 % and 150 % higher than those of LaGaO3： Tm^3＋ phosphors, respectively. The optimal Sn^4＋ doping concentration is 1%. The LaGaO3 ： Tm^3＋, Sn^4＋ blue phosphor may be used in the field of UV-LEDs.

关 键 词：光致发光 荧光粉 LaGaO3:Tm^3+ Sn^4+ 

分 类 号：O482.3[理学—固体物理]