Shen Zhaohui, Zhao Suling, Song Dandan, Xu Zheng, Qiao Bo, Song Pengjie, Bai Qiongyu, Cao Jingyue, Zhang Gaoqian, Swelm Wageh
Key Laboratory of Luminescence and Optical Information (Beijing Jiaotong University), Ministry of Education, Beijing, 100044, China.
Department of Physics, Faculty of Science, King Abdulaziz University, Jeddah, 21589, Saudi Arabia.
Small. 2020 Jul;16(26):e1907089. doi: 10.1002/smll.201907089. Epub 2020 May 20.
Lead halide perovskites and their applications in the optoelectronic field have garnered intensive interest over the years. Inorganic perovskites (IHP), though a novel class of material, are considered as one of the most promising optoelectronic materials. These materials are widely used in detectors, solar cells, and other devices, owing to their excellent charge-transport properties, high defect tolerance, composition- and size-dependent luminescence, narrow emission, and high photoluminescence quantum yield. In recent years, numerous encouraging achievements have been realized, especially in the research of CsPbX (X = Cl, Br, I) nanocrystals (NCs) and surface engineering. Therefore, it is necessary to summarize the principles and effects of these surface engineering optimization methods. It is also important to scientifically guide the applications and promote the development of perovskites more efficiently. Herein, the principles of surface ligands are reviewed, and various surface treatment methods used in CsPbX NCs as well as quantum-dot light-emitting diodes are presented. Finally, a brief outlook on CsPbX NC surface engineering is offered, illustrating the present challenges and the direction in which future investigations are intended to obtain high-quality CsPbX NCs that can be utilized in more applications.
近年来，卤化铅钙钛矿及其在光电子领域的应用引起了广泛关注。无机钙钛矿（IHP）虽是一类新型材料，但被认为是最有前途的光电子材料之一。由于其优异的电荷传输特性、高缺陷容忍度、成分和尺寸依赖性发光、窄发射以及高光致发光量子产率，这些材料被广泛应用于探测器、太阳能电池和其他器件中。近年来，已取得了许多令人鼓舞的成果，尤其是在CsPbX（X = Cl、Br、I）纳米晶体（NCs）和表面工程研究方面。因此，有必要总结这些表面工程优化方法的原理和效果。科学地指导应用并更有效地促进钙钛矿的发展也很重要。在此，综述了表面配体的原理，并介绍了CsPbX NCs以及量子点发光二极管中使用的各种表面处理方法。最后，对CsPbX NC表面工程进行了简要展望，阐述了当前面临的挑战以及未来研究旨在获得可用于更多应用的高质量CsPbX NCs的方向。
