Enhancing thermal stability and photoluminescence of red-emitting Sr2Si5N8∶Eu phosphors via boron doping

• 作者: Hailong Yuan Zhifeng Huang Jianwen Zhang Ziqian Yin Xiangyu Lu Fei Chen Qiang Shen
• 来源期刊: 材料科学技术（英文版）
• 年，卷（期）: 2021,（35）
• 页码范围: 130-135
• 页数: 6页
• 语种: 英文

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 photo-luminescence property of the phosphors.In this work,both the thermal stability and photoluminescence property of a red phosphor Sr2Si5N8∶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 influ-ence the resistance of thermal degradation.Finally,combining with experimental characterization and calculations,the enhancing mechanism of thermal stability and photoluminescence by B was studied.