Kaishuai Zhang, Wenxuan Fan, Tianliang Yao, Shalong Wang, Zhi Yang, Jisong Yao, Leimeng Xu, Jizhong Song

Polymer‐Surface‐Mediated Mechanochemical Reaction for Rapid And Scalable Manufacture of Perovskite Qd Phosphors

  • Mechanical Engineering
  • Mechanics of Materials
  • General Materials Science

AbstractMetal halide perovskite quantum dots (QDs) have been considered new‐generation emitters for lightings and displays due to their high photoluminescence (PL) efficiency, tunable emission wavelength, and pure emission color. However, their commercialization process is currently hindered by the challenge of mass production in a quick and environmentally friendly manner. In this study, we propose a polymer‐surface‐mediated mechanochemical reaction (PMR) to prepare perovskite QDs using a high‐speed multifunction grinder for the first time. PMR possesses two distinctive features: (i) the ultra‐high rotating speed (>15000 rpm) of the grinder facilitates the rapid conversion of the precursor to perovskite; (ii) the surface‐rich polymer particulate ensures perovskite QDs with high dispersity, avoiding QD aggregation‐induced PL quenching. Therefore, PMR could successfully manufacture green perovskite QDs with a high PL quantum yield (PLQY) exceeding 90% in a highly material‐ (100% yield), time‐ (1 kg/min), and effort‐ (solvent‐free) efficient manner. Moreover, the PMR demonstrates remarkable versatility, including synthesizing by various polymers, and producing diverse colored and Pb‐free phosphors. Importantly, these phosphors featuring a combination of polymer and perovskite, are facilely processed into various solid emitters for lightings. The proposed rapid, green, and scalable approach has great potential to accelerate the commercialization of perovskite QDs.This article is protected by copyright. All rights reserved

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