Critical Red Components for Next-Generation White LEDs
Critical Red Components for Next-Generation White LEDs
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DOI：
10.1021/acs.jpclett.5b02433
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发表时间：
2016-02-04
影响因子：
5.7
通讯作者：
Liu, Ru-Shi
中科院分区：
文献类型：
--
作者：
Lin, Chun Che;Meijerink, Andries;Liu, Ru-Shi
具有高显色指数和低相关色温的暖白色LED经历了快速发展。在这方面，最近已经广泛研究了红色发光材料，例如氟化物磷光体，即A（2）MF（6）：Mn 4+（A = K、Na和Cs; M = Si、Ge、Zr、Sn和Ti）和XSiF 6：Mn 4+（X = Ba或Zn）、氮铝酸盐磷光体（Sr[LiAl 3 N4]：Eu 2+）和碘化铯铅钙钛矿（CsPbI 3）的纳米晶体。这些化合物在可见红色光谱区域产生窄发射，人眼高度感知，并导致红色光谱的出色色饱和。本文介绍了关键红色组分的结构、发光性质、形貌、热特性和耐湿性，以及它们在实际应用中的局限性。这一观点也为光学研究的未来发展和科学挑战提供了基础。
Warm white LEDs with a high color rendering index and a low correlated color temperature have undergone rapid development. In this regard, red-emitting materials-such as fluoride phosphors, namely, A(2)MF(6):Mn4+ (A = K, Na, and Cs; M = Si, Ge, Zr, Sn, and Ti) and XSiF6:Mn4+ (X = Ba or Zn), nitridoaluminate phosphor (Sr[LiAl3N4]:Eu2+), and nanocrystals of cesium lead iodide perovskite (CsPbI3)-have been extensively investigated recently. These compounds generate narrow emissions in the visible red spectral region that are highly perceived by the human eye and lead to excellent chromatic saturation of the red spectra. This paper describes the structure, luminescence properties, morphologies, thermal features, and moisture resistance of critical red components, as well as their limitations for practical applications. This Perspective also provides a basis for future development and scientific challenges in optical research.