Yolk- shell structured Gd2O3: Eu3+ phosphor prepared by spray pyrolysis: the effect of preparation conditions on microstructure and luminescence properties

被引：25
作者：
Cho, Jung Sang [1 ]
Jung, Kyeong Youl [2 ]
Kang, Yun Chan [1 ]
机构：
[1] Korea Univ, Dept Mat Sci & Engn, Seoul 136713, South Korea
[2] Kongju Natl Univ, Dept Chem Engn, Cheonan 122324, South Korea
来源：
PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2015年 / 17卷 / 02期
基金：
新加坡国家研究基金会;
关键词：
KILOGRAM-SCALE PRODUCTION; PHOTOLUMINESCENCE PROPERTIES; SPHERICAL SHAPE; COMBUSTION SYNTHESIS; FACILE SYNTHESIS; ENERGY-TRANSFER; PARTICLES; NANOPARTICLES; POWDERS; MORPHOLOGY;
D O I：
10.1039/c4cp03477e
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Gd2O3: Eu3+ yolk-shell phosphor powders with high photoluminescence intensity were prepared by spray pyrolysis. Preparation temperature and spray solution concentration were varied to find the optimum process conditions for preparation of Gd2O3: Eu3+ with yolk-shell structure. The formation mechanism of yolk-shell Gd2O3: Eu3+ was systematically investigated by observing the microstructures of particles produced under various preparation conditions. The morphological structure of Gd2O3: Eu3+ powders was clearly dependent on reactor temperature and on the precursor solution concentration. Eventually, pure yolk-shell structured Gd2O3: Eu3+ powders were obtained for a reaction temperature of 1000 degrees C and concentration of the spray solution below 0.2 M. Also, the yolk-shell structure formed showed high thermal stability, making it possible to maintain the original spherical yolk- shell structure through calcination at high temperatures. As a result, highly crystalline Gd2O3: Eu3+ phosphor powders having yolk-shell structure and an agglomeration-free spherical shape were successfully synthesized by spray pyrolysis. These phosphor powders were shown to have good photoluminescence characteristics.
引用
收藏
页码：1325 / 1331
页数：7
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