Yang Zhaofeng, Wei Qianwen, Rong Meizhu, Yang Zhiyu, Wang Zhengliang, Zhou Qiang, Wang Qin
Key Laboratory of Comprehensive Utilization of Mineral Resource in Ethnic Regions, Joint Research Centre for International Cross-border Ethnic Regions Biomass Clean Utilization in Yunnan, School of Chemistry & Environment, Yunnan Minzu University, Kunming, 650500, P. R. China.
College of Chemistry and Chemical Engineering, Yunnan Normal University, Kunming, Yunnan 650500, P. R. China.
Dalton Trans. 2017 Jul 25;46(29):9451-9456. doi: 10.1039/c7dt01842h.
New red-emitting phosphors AHfF:Mn (A = Rb, Cs) with a single phase have been successfully synthesized via a simple ion exchange method, and their structures and luminescence properties were investigated. It was found that Mn ions in RbHfF and CsHfF who share wide band gaps can possess broad excitation bands in the blue regions and intense red emission with internal quantum yields of 0.556 and 0.652, respectively. Meanwhile, these red phosphors exhibit high chemical and thermal stabilities. A series of LED devices with a tunable color rendering index and color temperature were fabricated with these samples which can remarkably optimize the optical performances of white light-emitting diodes (w-LEDs). These results indicate that AHfF:Mn phosphors can be promising red phosphors in w-LEDs.
通过一种简单的离子交换方法成功合成了具有单相的新型红色发光磷光体AHfF:Mn（A = Rb，Cs），并对其结构和发光性能进行了研究。研究发现，具有宽带隙的RbHfF和CsHfF中的Mn离子在蓝色区域可具有宽激发带，并分别具有0.556和0.652的内量子产率的强红色发射。同时，这些红色磷光体表现出高化学稳定性和热稳定性。用这些样品制备了一系列具有可调显色指数和色温的LED器件，这些器件可以显著优化白光发光二极管（w-LED）的光学性能。这些结果表明，AHfF:Mn磷光体有望成为w-LED中的红色磷光体。
