Synthesis and photoluminescence properties of Ca_3R_(2–x)WO_9:xEu^(3+)(R=Y, Gd) phosphors

作     者：茹晶晶 秦小焕 颜桂炀 陈建中 RU Jingjing;QIN Xiaohuan;YAN Guiyang;CHEN Jianzhong

作者机构：Department of Chemistry Ningde Normal University School of Chemistry and Pharmaceutical Sciences Guangxi Normal Univer-sity College of Chemistry and Chemical Engineering Fuzhou University 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2015年第33卷第2期

页      面：135-139页

核心收录：

学科分类：081702[工学-化学工艺] 0709[理学-地质学] 0819[工学-矿业工程] 08[工学] 0817[工学-化学工程与技术] 0708[理学-地球物理学] 0703[理学-化学] 

基　　金：Project supported by the Fujian Provincial Department of Education Project(JA13331) 

主　　题：tungstate rare earth luminescence LED 

摘      要：Ca3R2–xWO9：xEu^3＋（R=Y, Gd） red-emitting phosphors were prepared by solid state reactions. These samples were characterized by differential scanning calorimetry and thermogravimetry analysis（DSC-TGA）, X-ray diffraction（XRD）, Fourier transform infrared spectroscopy（FTIR）, photoluminescence（PL） and field emission scanning electron microscopy（FE-SEM） analyses. The optimum sintering temperature for these phosphors was 1100 ℃, and the optimum sintering time was 2 h. The optimum doped concentration of Eu^3＋ in Ca3Y2–xWO9：xEu^3＋ and Ca3Gd2–xWO9：xEu^3＋ were x=1.5 and x=1.1, respectively. These phosphors could be excited by near-UV light of 394 nm and blue light of 465 nm, and showed strong red emission line at 612 nm（^5D0→^7F2）, which indicated that Ca3R2–xWO9：xEu^3＋（R=Y, Gd） were promising red candidates for white LED.