文献类型：期刊文献

英文题名：Highly luminescent lead bromine perovskite via fast and eco-friendly water-assisted mechanochemical method

作者：Chen, Long[1];Yuan, Shuanglong[1];Chen, Aiping[1];Liu, Chuanqi[1];Tong, Hua[1];Zeng, Huidan[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Inst Inorgan Mat, Key Lab Ultrafine Mat,Minist Educ, Shanghai 200237, Peoples R China

年份：2022

卷号：127

外文期刊名：OPTICAL MATERIALS

收录：;EI(收录号：20221411911029);WOS:【SCI-EXPANDED(收录号:WOS:000792537300002)】；

语种：英文

外文关键词：Perovskite; Water-assisted; Mechanochemical; Photoluminescence; Stability

摘要：All-inorganic cesium lead halide perovskite nanocrystals (CPeNCs) have aroused tremendous research attention due to their excellent photophysical properties. Here, we report an eco-friendly and fast water-assisted mecha-nochemical synthesis of CsPbBr3 perovskite functionalized by oleic acid (OA) and hydroxyl groups (OH). Owing to the water exfoliation and mechanical shearing force, the CsPbBr3 bulks quickly transformed into rectangular CsPbBr3 particles in 10 min with a bright green emission (lambda(em) = 525 nm) and a high photoluminescence quantum yield (PLQY) up to 53%. Impressively, the functionalized CsPbBr3 retains their bright green emission in ethanol after 360 days, showing high ethanol resistance. Thus, an alcohol solubility and easy film-forming transparent polymer of polyvinyl butyral (PVB) is directly employed to encapsulate functionalized CsPbBr3 in ethanol solution. The obtained CsPbBr3/PVB composite film shows excellent water resistance, whose photoluminescence intensity drops only 20% after 60 h in water. The composite film was demonstrated as color converter layers of white light-emitting diodes device with color coordinates of (0.329, 0.321). This work not only offers a green synthesis method for perovskite fluorescent material, but also helps to address their long-term stability in polar solvents towards their various applications.