钙钛矿光伏材料缺陷态钝化的研究

Organic–inorganic perovskite solar cells (PSCs) have shown breathtaking development and huge application prospect in recent years due to their potential high cost performance, which is probably attributed to the amazing advantages of the extraordinary perovskite materials, such as almost ideal direct bandgap, large absorption coefficient, and high charge-carrier mobility. To achieve high-performance perovskite solar cells (PSCs), it is important to investigate trap state passivation, since the trap states in perovskites can induce severe charge carrier recombination. With the aim of efficient conversion of light into electricity, the project focuses on the passivation mechanism of perovskite material trap states, explores efficient and stable trap state passivators, manufactures high-quality perovskite materials, and strives to develop high-efficiency solar cells with low cost and good stability, affording fundamental experimental data for developing clean and renewable energy source.

有机-无机杂化钙钛矿太阳能电池由于具有材料成本低廉、能量转换效率高和易加工制备等优点，成为近年来光伏领域的研究热点。钙钛矿材料中缺陷态的存在会导致严重的载流子复合，抑制电池的光伏性能，因此，钙钛矿材料缺陷态的钝化对进一步提高电池的光伏效率具有重要的意义。本项目拟围绕高效率地将光转换为电这一核心问题，重点探索钙钛矿材料缺陷态的钝化机制，发掘高效稳定的缺陷态钝化剂，制备高质量的钙钛矿材料，力争研制出高效率、低成本和稳定性好的薄膜太阳能电池，为开发清洁可再生能源提供基础数据。

有机-无机杂化钙钛矿太阳能电池由于具有材料成本低廉、能量转换效率高和易加工制备等优点，成为近年来光伏领域的研究热点。钙钛矿材料中缺陷态的存在会导致严重的载流子复合，抑制电池的光伏性能。本项目聚焦如何抑制钙钛矿材料的缺陷这一关键科学问题，在分析研究缺陷产生及钝化的理论机制基础上，通过合适缺陷态钝化剂的引入、材料组成结构的优化以及成膜工艺的探索，制备低缺陷态的高质量钙钛矿薄膜，结合其他功能层的能级匹配、界面工程等研究，提升钙钛矿太阳能电池的光伏效率。研究结果对后续提高钙钛矿光活性层性能的研究具有重要的指导意义，所制备的锡基钙钛矿电池多年保持文献报道的最高记录。