Fan Qianqian, Biesold-McGee Gill V, Ma Jianzhong, Xu Qunna, Pan Shuang, Peng Juan, Lin Zhiqun
College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science & Technology, Xi'an, 710021, P. R. China.
School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA.
Angew Chem Int Ed Engl. 2020 Jan 13;59(3):1030-1046. doi: 10.1002/anie.201904862. Epub 2019 Dec 12.
In recent years, there have been rapid advances in the synthesis of lead halide perovskite nanocrystals (NCs) for use in solar cells, light emitting diodes, lasers, and photodetectors. These compounds have a set of intriguing optical, excitonic, and charge transport properties, including outstanding photoluminescence quantum yield (PLQY) and tunable optical band gap. However, the necessary inclusion of lead, a toxic element, raises a critical concern for future commercial development. To address the toxicity issue, intense recent research effort has been devoted to developing lead-free halide perovskite (LFHP) NCs. In this Review, we present a comprehensive overview of currently explored LFHP NCs with an emphasis on their crystal structures, synthesis, optical properties, and environmental stabilities (e.g., UV, heat, and moisture resistance). In addition, strategies for enhancing optical properties and stabilities of LFHP NCs as well as the state-of-the-art applications are discussed. With the perspective of their properties and current challenges, we provide an outlook for future directions in this rapidly evolving field to achieve high-quality LFHP NCs for a broader range of fundamental research and practical applications.
近年来，用于太阳能电池、发光二极管、激光器和光电探测器的卤化铅钙钛矿纳米晶体（NCs）的合成取得了快速进展。这些化合物具有一系列引人入胜的光学、激子和电荷传输特性，包括出色的光致发光量子产率（PLQY）和可调谐光学带隙。然而，必需包含的有毒元素铅对未来的商业发展提出了关键问题。为了解决毒性问题，近期的大量研究致力于开发无铅卤化钙钛矿（LFHP）NCs。在本综述中，我们全面概述了目前所探索的LFHP NCs，重点介绍其晶体结构、合成、光学性质和环境稳定性（如抗紫外线、耐热和防潮性）。此外，还讨论了增强LFHP NCs光学性质和稳定性的策略以及最新应用。从其性质和当前挑战的角度出发，我们对这一快速发展领域的未来方向进行了展望，以实现高质量的LFHP NCs，用于更广泛的基础研究和实际应用。
