原子尺度单层离子液体界面调控新型三结叠层钙钛矿太阳能电池

钙钛矿太阳能电池作为当前国际前沿研究热点，技术发展迅猛，被认为是最具产业化实力的新型太阳能电池。效率提升及稳定性是实现产业化急需解决的重大问题。特定材料调控及叠层结构是提高效率及稳定性的有效策略。叠层结构理论效率达32-45%，有很大提升空间，但传统叠层结构存在诸多制约。针对上述前沿科学问题，本项目通过开发原子尺度界面调控新材料及构建新型叠层结构，提供独特新颖的解决方案，以探索新型原子尺度单层离子液体界面调控材料及新型三结叠层电池为核心，以拓宽电池吸收光谱、大幅提高电池效率及稳定性为目标，探索单层离子液体的制备方法及形成机制、高质量钙钛矿薄膜调控机制，从分子水平明确单层离子液体对钙钛矿薄膜及电池光电性能的影响规律及调控机制，构建新型高效三结叠层钙钛矿太阳能电池体系，明确其叠加原理及优化机制，实现电池光电转换效率的突破及稳定性的大幅提高，为电池的高效、低成本及大面积化提供理论依据和应用基础。

As the current hot topic of the international research frontiers, perovskite solar cell (PSCs) with a ultrafast development, is considered to be the most promising for industrialization. High efficiency and the stability are scientific problems need to be resolved for realizing industrialization. Using specific materials for interfaces and the tandem structures with the theoretical efficiency of 32-45% are the efficient methods. However, there are many restricts and disadvantages on the traditional tandem structures. To resolve the above key issues, in this work, the unique resolution strategies are provided by developing the untrathin monolayered ionic liquid materials and novel types of triple-junction tandem PSCs. To achieve a breakthrough on the conversion efficiency and the stabilities, new ionic liquid-based materials with different layers are explored. The fabrication technologies and mechanism for the monolayered ionic liquids, high-quality perovskite films and the photovoltaic performance of PSCs are systematically investigated. Furthermore, the superposition principle and optimization mechanism on the triple-junction tandem PSCs are clearly clarified. To provide the new strategy for high efficient and stable PSCs, this work should have some theoretical and practical implications for improving the photovoltaic performance, realizing large-area production of PSCs.