Spectral Property and Thermal Quenching Behavior of Tb3+-Doped YAG:Ce Phosphor

被引：0

作者：

Guo Wang ^{[1
,2
]}

Shi Hong-Ling ^{[1
]}

Huang Ji-Quan ^{[2
]}

Deng Zhong-Hua ^{[2
]}

Yuan Xuan-Yi ^{[1
]}

Cao Yong-Ge ^{[1
]}

机构：

[1] Renmin Univ China, Beijing Key Lab Optoelect Funct Mat & Micronano D, Beijing 100872, Peoples R China

[2] Chinese Acad Sci, Fujian Inst Res Struct Matter, Key Lab Optoelect Mat Chem & Phys, Fuzhou 350002, Peoples R China

来源：

CHINESE JOURNAL OF STRUCTURAL CHEMISTRY | 2016年 / 35卷 / 02期

基金：

中国国家自然科学基金;

关键词：

YAG:Ce; Tb phosphors; spectra properties; thermal quenching; white LEDs; ENERGY-TRANSFER; LUMINESCENT PROPERTIES; CERIUM; CE3+; PHOTOLUMINESCENCE; TB3+; SUBSTITUTION; ABSORPTION; EMISSION; Y3AL5O12;

D O I：

暂无

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A series of YAG:Ce, Tb phosphors were synthesized by vacuum sintering method. Moreover, their spectral properties, thermal quenching behaviors and color rendering properties were investigated systematically. The photoluminescence emission spectra of YAG:Ce, Tb show a great red shift compared with that of YAG:Ce. Direct energy transfer from Tb3+ to Ce3+ ions is verified based on the analysis of different photoluminescence spectra. The quenching temperature for Tb3+-doped YAG:Ce phosphors is about 490 K. The thermal activation energy is estimated to be 0.18 and 0.291 eV for Tb3+-doped YAG:Ce and YAG:Ce phosphors, respectively. The smaller activation energy for Tb3+-doped YAG:Ce means a more rapid nonradiative transition from 5d to 4f state, thus resulting in the lower quenching temperature. In addition, white LEDs with improved color rendering properties are achieved by using modified YAG:Ce, Tb phosphors.

引用

页码：326 / 334

页数：9

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