Tan Huiying, Rong Meizhu, Zhou Yayun, Yang Zhiyu, Wang Zhengliang, Zhang Qiuhan, Wang Qin, Zhou Qiang
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.
Dalton Trans. 2016 Jun 21;45(23):9654-60. doi: 10.1039/c6dt01693f. Epub 2016 May 25.
A single-phased Mn(4+) doped fluorozirconate red phosphor, K3ZrF7:Mn(4+), has been successfully synthesized. Its structure, morphology, composition and optical properties were investigated by X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray spectroscopy, atomic absorption spectroscopy, diffuse reflectance spectroscopy, photoluminescence spectroscopy and by using luminescence decay curves. It was found that Mn(4+) ions only coordinating with seven F(-) anions in a K3ZrF7 crystal field can possess intense red emission under blue light illumination. Mixing the obtained K3ZrF7:Mn(4+) red phosphor with commercial Y3Al5O12:Ce(3+) and coating the mixture on a blue-GaN chip, obvious warm white light with a low correlated color temperature (2970 K) and a high color rendering index (Ra = 91.4 and R9 = 72) were achieved from white light-emitting diode devices.
一种单相掺锰（IV）的氟锆酸盐红色荧光粉K3ZrF7:Mn(4+)已成功合成。通过X射线衍射、扫描电子显微镜、能量色散X射线光谱、原子吸收光谱、漫反射光谱、光致发光光谱以及发光衰减曲线对其结构、形态、组成和光学性质进行了研究。发现在K3ZrF7晶体场中仅与七个氟离子配位的锰（IV）离子在蓝光照射下可发出强烈的红色发射。将所得K3ZrF7:Mn(4+)红色荧光粉与商用Y3Al5O12:Ce(3+)混合，并将混合物涂覆在蓝色氮化镓芯片上，从白光发光二极管器件中获得了具有低相关色温（2970 K）和高显色指数（Ra = 91.4，R9 = 72）的明显暖白光。
