胍基材料钝化钙钛矿太阳能电池的研究进展

Perovskite solar cells passivated by guanidine-based materials

经过十多年的快速发展,钙钛矿太阳能电池被认为是最具应用潜力的光伏技术之一,目前的主要挑战是器件光电转换效率还需提高,稳定性待突破.大量研究显示,对钙钛矿晶体及钙钛矿/载流子传输层界面进行钝化处理,可修复晶体及界面处的深层缺陷,有效提高钙钛矿太阳能电池的性能.胍基材料在缺陷钝化方面已有较深入研究,本文综述了不同类型的胍基材料应用于钙钛矿太阳能电池钝化的最新研究进展.首先,介绍了钙钛矿太阳能电池的体系结构及胍基材料的钝化潜力;其次,重点分析了卤化胍盐、非卤化胍盐、胍基衍生物盐以及胍基小分子等对钙钛矿太阳能电池的钝化及其机理;最后,总结了胍基材料在该领域的应用现状,对多功能胍基材料的进一步开发进行了展望.

Based on the merits of over a decade of research,perovskite solar cells(PSCs)have emerged as a promising nextgeneration photovoltaic technology.However,the commercialization of PSCs is limited by the challenges involved in improving their efficiency and stability.The previous reports have demonstrated that passivation treatments repair the deep defects in perovskite crystals and at the perovskite/carrier transport layer interface,leading to an enhancement in PSC performance.Furthermore,guanidine-based materials have been intensively investigated in the passivation of PSC defects.In this review,the recent progress on the passivation of PSCs via guanidine-based materials is described in detail.First,the structure of PSCs and the application potential of guanidine-based materials in PSCs are introduced.Second,the passivation mechanisms of guanidine halide,non-halide guanidine,guanidine derivatives,and guanidine small molecules on PSCs are systematically analyzed.Finally,the conclusion and outlook for multifunctional guanidine-based materials are addressed.