Eu^2+掺杂UCr4C4基窄带硅酸盐荧光粉的研究进展与应用  

Progress and Application of Eu2+-doped Narrow-Band Silicate Phosphors with UCr4C4-Related Type Structure

作　　者：赵鸣 廖泓旭 夏志国[1,2] Zhao Ming;Liao Hongxu;Xia Zhiguo(The Beijing Municipal Key Laboratory of New Energy Materials and Technologies,School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China;State Key iMboratory of Luminescent Materials and Devices,Guangdong Provincial Key laboratory of Fiber Laser Materials and Applied Techniques,School of Materials Science and Engineering,South China University of Technology,Guangzhou 510641,China)

机构地区：[1]北京科技大学材料科学与工程学院,新能源材料与技术北京市重点实验室,北京100083 [2]华南理工大学材料科学与工程学院,发光材料与器件国家重点实验室,广东省光纤激光材料与应用技术重点实验室,广东广州510641

出　　处：《中国稀土学报》2020年第3期257-277,I0001,共22页Journal of the Chinese Society of Rare Earths

基　　金：国家自然科学基金项目(51722202,51972118,51572023)资助。

摘　　要：具有窄带发射的无机发光材料既可协同提升照明器件的显色指数和流明效率(如窄带红色发光材料),也可增大液晶显示器件的色域(如窄带蓝色、绿色和红色发光材料),在照明和显示用发光二极管(light-emitting diodes, LED)器件中具有重要的应用前景。其中稀土发光材料中常用的Eu^2+和Ce^3+离子具有4f-5d跃迁,但由于晶体场效应而呈现不同程度的峰展宽效应,迄今为止,人们发现的Eu^2+和Ce^3+掺杂的窄带发射发光材料基质体系十分有限,特别是Eu^2+掺杂的新型窄带荧光粉研究是一项重要挑战。近年来,人们首先在Eu^2+掺杂UCr4C4基氮化物窄带荧光粉研究中取得了重要进展,发现了一系列具有潜在应用前景的窄带氮化物红光发射材料。而最近,本课题组在Eu^2+掺杂UCr4C4基窄带硅酸盐荧光粉研究领域获得了突破,基于此,概述了Eu^2+掺杂UCr4C4基窄带硅酸盐荧光粉的研究进展与应用,指出了UCr4C4基氮化物与硅酸盐的结构演变特征,并由此总结了几类UCr4C4基窄带硅酸盐化合物的结构特点和Eu^2+掺杂荧光粉的发光特性,进一步地对Eu^2+掺杂UCr4C4基窄带硅酸盐荧光粉的应用进行了介绍,指出了当前在调控其光色和提升其化学稳定性所面临的挑战和所做的一些有意义的尝试。最后对Eu^2+掺杂UCr4C4基氧化物窄带荧光粉的未来发展进行了展望。Inorganic luminescent materials with narrow-band emission are widely used in light emitting diode(LED) for illumination and display devices, which can improve the color rendering index and luminous efficacy of illumination devices(such as narrow-band red phosphors), and can also increase the color gamut of liquid crystal display devices(such as narrow-band blue/green/red phosphors). So far, such new narrow-band inorganic luminescent materials host systems are very limited, and especially the research of Eu^2+ doped new narrow-band phosphor remains a challenge, because Eu^2+ and Ce^3+ with 4f-5d transition usually exhibit the peak broadening effect due to the crystal field effects. In recent years, the research focused on the phosphors with the UCr4C4-related type structure have made great progress, and a series of narrow-band red-emitting nitride phosphors with potential application have been discovered. More recently, our research group has made breakthroughs in the research of Eu^2+ doped narrow-band silicate phosphors with the UCr4C4-related type structure. Here in this review, the recent progress and application of Eu^2+ doped narrow-band silicate phosphors with the UCr4C4-related type structure are reviewed. The structural evolution characteristics of nitrides and silicates with the UCr4C4-related type structure are pointed out, and the crystal structure characteristics, luminescence properties are summarized. Afterwards, the application of Eu^2+ doped narrow-band silicate phosphors with the UCr4C4-related type structure are introduced, and the current challenges in tuning photoluminescence color and improving chemical stability and the meaningful attempts are pointed out. Finally, the future developments of Eu^2+ doped narrow-band oxide phosphors with the UCr4C4-related type structure are prospected.

关 键 词：UCr4C4模型 荧光粉 窄带发射 LED 稀土 

分 类 号：O482.31[理学—固体物理]