Study on white-light emission and light-emitting mechanism of hydrothermally synthesized YVO_4:1 mol.%Dy^(3+),x mol.%Eu^(3+) phosphor powders

作     者：刘红涛 梁艳 郜小勇 张飒 LIU Hongtao;LIANG Yan;GAO Xiaoyong;ZHANG Sa

作者机构：Key Laboratory of Materials Physics of Ministry of Education of China School of Physics and Engineering Zhengzhou University College of Information Science and Engineering Henan University of Technology 

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

年 卷 期：2016年第34卷第2期

页      面：113-117页

核心收录：

学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 

基　　金：supported by the National Natural Science Foundation of China(60807001) the Foundation of Young Key Teachers from Universities of Henan Province(2011GGJS-008) the Foundation of Henan Educational Committee(2010A140017) 

主　　题：YVO4 Dy3+,Eu3+ phosphor powders hydrothermal synthesis white-light emission photoluminescence energy transfer rare earths 

摘      要：White light-emitting YVO4:1 mol.%Dy3+,x mol.%Eu3+ phosphor powders with order morphology and well crystallization were hydrothermally synthesized at 180°C. The microstructure, white-light emission, and light-emitting mechanism of the powders were carefully studied using X-ray diffractometry, scanning electron microscopy and photoluminescence spectra. The excitation and emission spectra of the phosphor powders indicated the coexistence of efficient energy transfer from Eu3+ to Dy3+ and inefficient en-ergy transfer from Dy3+ to Eu3+ besides the energy transfer from VO43– to Eu3+. Increasing the Eu3+ concentration initially enhanced and then weakened the luminescent intensity of Dy3+. The white-light emissions of YVO4:1 mol.%Dy3+,xmol.%Eu3+ phosphor pow-ders were both related to the energy transfer between VO43– and Dy3+/Eu3+, as well as between Eu3+ and Dy3+. The inefficient energy transfer from Dy3+ to Eu3+ was first found.