发光二极管
材料科学
荧光粉
热稳定性
发光效率
光电子学
硼硅酸盐玻璃
卤化物
发光
显色指数
光致发光
钙钛矿(结构)
结晶
二极管
化学工程
纳米技术
化学
无机化学
冶金
工程类
图层(电子)
作者
Zelong Zhang,Linli Shen,Qian Zhang,Ling Ding,Guangzhan Shao,Xiaojuan Liang,Weidong Xiang
标识
DOI:10.1016/j.cej.2019.122125
摘要
Currently, the application of all-inorganic cesium lead halide perovskite (CsPbX3, X = Cl, Br, I) quantum dots (QDs) is limited due to toxicity of lead and poor ambient stability. In our work, a series of Ti-doped CsPbI3 QDs were successfully prepared in borosilicate glass (SiO2-B2O3-ZnO) by the melt quenching and in situ crystallization technique. The samples showed excellent water/thermal stability, and the tunable emission (650–695 nm) was controlled by different Ti contents and heat treatment temperatures. In particular, the optical properties of CsPb1−xTixI3 [email protected] (x ≤ 0.5) are superior to those of pristine CsPbI3 [email protected] As a result, the wLED was assembled using red-emitting CsPb1−xTixI3 [email protected] and yellow-emitting Ce3+:YAG phosphor under excitation of InGaN blue chip, which demonstrated an outstanding luminous efficiency of 102.44 lm/W, a high color rendering index of 80.6. Particularly, Ti-doped CsPbI3 [email protected] with red and far-red light are combined with a blue-chip to assemble an LED device, which exactly satisfies the lighting conditions of plant growth.
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