发光
热稳定性
材料科学
钙钛矿(结构)
纳米晶
量子产额
化学工程
卤化物
复合数
纳米技术
无机化学
光致发光
化学
氢氟酸
光电子学
复合材料
光学
荧光
冶金
工程类
物理
作者
Sunqi Lou,Si Shi,Lin Huang,Weijiang Gan,Bang Lan,Jinhui Zhang,Manrong Li,Tongtong Xuan,Jing Wang
标识
DOI:10.1016/j.cej.2021.132680
摘要
All inorganic lead cesium halide perovskites (CsPbX3, X = Cl, Br, I) nanocrystals (NCs) are supposed to be promising luminescent-converting materials for next-generation displays, on account of their excellent optical and photoelectric properties, facile synthesis, and low cost. However, the inherent poor stability hinders their implementation in practical applications. Here, we present a simple cooperative strategy for the synthesis of stable green perovskite composite luminophore powders. In a typical cooperative process, HF leads to the formation of PbBrF framework in which the green-emitting CsPbBr3 NCs that are transformed from the non-emitting precursors CsPb2Br5 NCs by hydration, are simultaneously embedded in. The obtained CsPbBr3/PbBrF composites NCs maintain photoluminescence quantum yield (∼ 30%) and narrow band emission (∼ 22 nm). Additionally, benefiting from the PbBrF framework with good thermal diffusivity and stability, CsPbBr3/PbBrF composite NCs show excellent stability to heat, radiation, and polar solvents, which can be used as promising green luminescent-converting materials in the next-generation displays.
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