荧光粉
量子效率
热稳定性
发光
材料科学
光电子学
二极管
固态照明
分析化学(期刊)
磷光
光谱学
发光二极管
化学
荧光
光学
物理
有机化学
量子力学
色谱法
作者
Jianyan Ding,Xufeng Zhou,Shitong Lin,Wenxin Zhang,Lizhen Shi,Jiang Zhou,Shanshan Ye,Quansheng Wu
标识
DOI:10.1021/acs.jpcc.2c01442
摘要
Bi3+-activated phosphors have demonstrated great values in solid-state lighting, biomedicine, and detectors. Low quantum efficiency and unsatisfactory thermal stability are the main reasons that limit the practical application of Bi3+-activated phosphors. In this study, a high-efficiency and stable orange-light-emitting phosphor induced by D-band emission, Ba2LuGaO5:Bi3+, was successfully synthesized by selecting gallate with a highly rigid structure and appropriate cation sites. Under the excitation of near-ultraviolet light, Ba2LuGaO5:Bi3+ emits strong orange light with an internal quantum efficiency of 73% and thermal stability of 80%@150 °C. Based on two possible models of metal-to-metal charge-transfer transition and Bi3+ pairs/clusters, the origin of D-band emission is discussed in detail. According to the crystallographic data and spectroscopy data analysis, the luminescence of Ba2LuGaO5:Bi3+ is generated by the Bi3+ pair/cluster. The results indicate that Ba2LuGaO5:Bi3+ is of great potential in white-light-emitting diodes.
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