Wu Guangbao, Liang Rui, Ge Mingzheng, Sun Guoxing, Zhang Yuan, Xing Guichuan
Institute of Applied Physics and Materials Engineering, University of Macau, Avenida da Universidade, Taipa, Macau, 999078, China.
School of Textile and Clothing, Nantong University, Nantong, 226019, P. R. China.
Adv Mater. 2022 Feb;34(8):e2105635. doi: 10.1002/adma.202105635. Epub 2022 Jan 17.
3D perovskite solar cells (PSCs) have shown great promise for use in next-generation photovoltaic devices. However, some challenges need to be addressed before their commercial production, such as enormous defects formed on the surface, which result in severe SRH recombination, and inadequate material interplay between the composition, leading to thermal-, moisture-, and light-induced degradation. 2D perovskites, in which the organic layer functions as a protective barrier to block the erosion of moisture or ions, have recently emerged and attracted increasing attention because they exhibit significant robustness. Inspired by this, surface passivation by employing 2D perovskites deposited on the top of 3D counterparts has triggered a new wave of research to simultaneously achieve higher efficiency and stability. Herein, we exploited a vast amount of literature to comprehensively summarize the recent progress on 2D/3D heterostructure PSCs using surface passivation. The review begins with an introduction of the crystal structure, followed by the advantages of the combination of 2D and 3D perovskites. Then, the surface passivation strategies, optoelectronic properties, enhanced stability, and photovoltaic performance of 2D/3D PSCs are systematically discussed. Finally, the perspectives of passivation techniques using 2D perovskites to offer insight into further improved photovoltaic performance in the future are proposed.
三维钙钛矿太阳能电池（PSCs）在下一代光伏器件中展现出了巨大的应用前景。然而，在其商业化生产之前，仍有一些挑战需要解决，比如在表面形成大量缺陷，这会导致严重的肖克利-里德-霍尔（SRH）复合，以及组成成分之间的材料相互作用不足，从而引发热、湿气和光致降解。二维钙钛矿中，有机层起到保护屏障的作用，可阻挡湿气或离子的侵蚀，最近已崭露头角并吸引了越来越多的关注，因为它们表现出显著的稳定性。受此启发，通过在三维钙钛矿顶部沉积二维钙钛矿进行表面钝化，引发了新一轮研究热潮，旨在同时实现更高的效率和稳定性。在此，我们查阅了大量文献，全面总结了利用表面钝化的二维/三维异质结PSC的最新进展。综述首先介绍晶体结构，接着阐述二维和三维钙钛矿结合的优势。然后，系统讨论二维/三维PSC的表面钝化策略、光电特性、增强的稳定性和光伏性能。最后，提出了利用二维钙钛矿的钝化技术的前景，以期为未来进一步提高光伏性能提供见解。
