Cheng Xiao, Gan Xinguang, Jin Gan, Chen Zhaolai, Li Ning
School of Materials Science and Engineering, Shandong University, Jinan, 250061, China.
Senior Engineer Experimental Training Center, Shandong Urban Construction Vocational College, Jinan, 250103, China.
ChemSusChem. 2025 Feb 16;18(4):e202401366. doi: 10.1002/cssc.202401366. Epub 2024 Nov 8.
Metal halide perovskite single crystals hold promise for photovoltaics with high efficiency and stability due to their superior optoelectronic properties and weak bulk ion migration. The past several years have witnessed rapid development of single-crystal perovskite solar cells (PSCs) with efficiency rocketed from 6.5 % to 24.3 %, however, which still lags behind their polycrystalline counterparts. Moreover, the poor device stability under light illumination is contrary to the high ion migration barrier of perovskite single crystals. The key limiting factors should be the low crystalline quality and high surface defect density of solution-grown thin single crystals. Under this circumstance, a review paper summarizing the recent progress and challenges will be instructive for future development of this emerging field. In this manuscript, the crystal engineering used to enhance carrier transport and suppress carrier recombination in vertical single-crystal PSCs will be summarized initially, including crystal growth, component control, surface and interface modification. Subsequently, the application of perovskite single crystals in lateral single-crystal PSCs will be discussed and compared with the conventionally vertical structure. Finally, the challenges and proposed strategies for the development of single-crystal PSCs are provided.
金属卤化物钙钛矿单晶因其优异的光电性能和较弱的体离子迁移特性，在高效且稳定的光伏领域颇具潜力。在过去几年中，单晶钙钛矿太阳能电池（PSC）发展迅速，效率从6.5%飙升至24.3%，然而，其效率仍落后于多晶钙钛矿太阳能电池。此外，光照下器件稳定性较差与钙钛矿单晶的高离子迁移势垒相悖。关键限制因素应为溶液生长的薄单晶的低结晶质量和高表面缺陷密度。在这种情况下，一篇总结近期进展和挑战的综述文章对这一新兴领域的未来发展将具有指导意义。在本手稿中，将首先总结用于增强垂直单晶PSC中载流子传输和抑制载流子复合的晶体工程，包括晶体生长、成分控制、表面和界面修饰。随后，将讨论钙钛矿单晶在横向单晶PSC中的应用，并与传统的垂直结构进行比较。最后，给出了单晶PSC发展面临的挑战和提出的策略。
