Concentration effect and temperature quenching of upconversion luminescence in Ba Gd_2ZnO_5:Er^(3+)/Yb^(3+) phosphor
Concentration effect and temperature quenching of upconversion luminescence in Ba Gd_2ZnO_5:Er^(3+)/Yb^(3+) phosphor作者机构：Department of Physics Dalian Maritime University
出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)
年 卷 期：2015年第33卷第7期
页 面：686-692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 National Natural Science Foundation of China(11104023,11104024,11374044) Fundamental Research Funds for the Central Universities(3132014087,3132014327,3132013100) the State Key Developmment Program for Basic Research of China(973 program,2012CB626801)
主 题：BaGd2ZnO5：Er^3＋/yb^3＋ phosphor solid state reaction upconversion crossover rare earths
摘 要：Er^3＋/yb^3＋ codoped zincate BaGd2ZnO5 phosphors were synthesized via a traditional solid state reaction. The crystal structure and phase purity were checked by means of X-ray dfluence of Eiffraction （XRD）, and the results showed that pure phase BaGd2ZnO5 phosphors with various Er^3＋/yb^3＋ concentrations were obtained. The Er^3＋ and Yb^3＋ doping concentrations on the green and red upconversion emissions was studied. It was found that both green and red upconversion emissions under 980 nm excitation were two-photon processes independent from the rare earth doping concentrations. However, the upconversion luminescence intensities greatly depended on the rare earth doping concentration. Furthermore, the population processes of upconversion luminescence and the quenching mechanisms were analyzed. The temperature-dependent green upconvcrsion luminescence was studied, and the temperature quenching process of two green upconversion emissions was modeled. The thermal quenching processes of the green upconversion emissions could be well explained by the model we proposed.
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