文献类型：期刊文献

英文题名：PTFE-based microreactor system for the continuous synthesis of full-visible-spectrum emitting cesium lead halide perovskite nanocrystals

作者：Zhang, Chengxi[1];Luan, Weiling[1];Yin, Yuhang[1];Yang, Fuqian[2]

机构：[1]East China Univ Sci & Technol, Key Lab Pressure Syst & Safety MOE, Sch Mech & Power Engn, Shanghai 200237, Peoples R China;[2]Univ Kentucky, Dept Chem & Mat Engn, Lexington, KY 40506 USA

年份：2017

卷号：8

期号：1

起止页码：2521

外文期刊名：BEILSTEIN JOURNAL OF NANOTECHNOLOGY

收录：;EI(收录号：20175004520345);WOS:【SCI-EXPANDED(收录号:WOS:000416341900001)】；

基金：This work was supported by National Natural Science Fund of China (51172072, 51475166).

语种：英文

外文关键词：cesium lead halid; microreactor system; nanocrystals; perovskite; photoluminescence

摘要：Colloidal perovskite nanocrystals comprised of all inorganic cesium lead halide (CsPbX3, X = Cl, Br, I or a mixture thereof) have potential as optical gain materials due to their high luminescence efficiency. In this work, cesium lead halide nanocrystals are continuously synthesized via a microreactor system consisting of poly(tetrafluoroethylene) (PTFE) capillaries. The synthesized nanocrystals possess excellent optical properties, including a full width at half maximum of 19-35 nm, high fluorescence quantum yield of 47.8-90.55%, and photoluminescence emission in the range of 450-700 nm. For the same precursor concentrations, the photoluminescence emission peak generally increases with increasing reaction temperature, revealing a controllable temperature effect on the photoluminescence characteristics of the synthesized nanocrystals. For quantum dots synthesized with a Br/I ratio of 1:3, a slight blue shift was observed for reaction temperatures greater than 100 degrees C. This PTFE-based microreactor system provides the unique capability of continuously synthesizing high-quality perovskite nanocrystals that emit over the full visible spectrum with applications ranging from displays and optoelectronic devices.