Self-Assembly of Perovskite CsPbBr3Quantum Dots Driven by a Photo-Induced Alkynyl Homocoupling Reaction
Self-Assembly of Perovskite CsPbBr3Quantum Dots Driven by a Photo-Induced Alkynyl Homocoupling Reaction
复制标题
光诱导炔基同偶联反应驱动钙钛矿CsPbBr(3)量子点的自组装
DOI：
10.1002/anie.202004947
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发表时间：
2020-08-07
影响因子：
16.6
通讯作者：
Jia, Dianzeng
中科院分区：
文献类型：
--
作者：
Li, Hongbo;Liu, Xiangdong;Jia, Dianzeng
在此，我们报告了由单个 CsPbBr(3) 钙钛矿量子点 (PQD) 自组装的三维 CsPbBr(3) 钙钛矿超晶 (PSC) 的轻松生长。通过改变表面结合配体分子 1-炔基酸的碳链长度，获得了不同形态的 PSC，并且与 PQD 相比，光致发光提高了 1000 倍以上。系统分析首次表明，在紫外线照射下，PQDs合成过程中形成的副产物CsBr可以有效催化两个炔基之间的自偶联反应，进一步成为推动PQDs自组装的驱动力。
Herein, we report the facile growth of three-dimensional CsPbBr(3)perovskite supercrystals (PSCs) self-assembled from individual CsPbBr(3)perovskite quantum dots (PQDs). By varying the carbon chain length of a surface-bound ligand molecule, 1-alkynyl acid, different morphologies of PSCs were obtained accompanied by an over 1000-fold photoluminescence improvement compared with that of PQDs. Systematic analyses have shown, for the first time, that under UV irradiation, CsBr, the byproduct formed during PQDs synthesis, could effectively catalyze the homocoupling reaction between two alkynyl groups, which further worked as a driving force to push forward the self-assembly of PQDs.