Enhancing thermal stability and photoluminescence of red-emitting Sr_(2)Si_(5)N_(8):Eu phosphors via boron doping  

作　　者：Hailong Yuan Zhifeng Huang Jianwen Zhang Ziqian Yin Xiangyu Lu Fei Chen Qiang Shen 

机构地区：[1]State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,China [2]Department of Materials Science and Engineering,Monash University,Melbourne,VIC 3800,Australia

出　　处：《Journal of Materials Science & Technology》2021年第35期130-135,共6页材料科学技术（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Nos.51872217,51472188,51521001);the Natural Research Funds of Hubei Province(No.2016CFB583);the Fundamental Research Funds for the Central Universities in China,and the"111"Project(No.B13035)。

摘　　要：Surface passivation is a common method to improve the resistance of thermal degradation of nitride phosphors.However,such a surface passivation generally needs extra processes and decreases the photoluminescence property of the phosphors.In this work,both the thermal stability and photoluminescence property of a red phosphor Sr_(2)Si_(5)N_(8):Eu are improved through the addition of BN.The influence of B on the crystal structure and the valence state of active ions was analyzed by experimental characterization.First-principles calculations were applied to analyze the formation energy of N vacancies,which influence the resistance of thermal degradation.Finally,combining with experimental characterization and calculations,the enhancing mechanism of thermal stability and photoluminescence by B was studied.

关 键 词：Nitride phosphors Thermal degradation Red-emitting First-principles calculations PHOTOLUMINESCENCE 

分 类 号：TN312.8[电子电信—物理电子学] TQ422[化学工程]