采用集成结构提高钙钛矿太阳电池性能

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单位1Center for Excellence in Nanoscience (CAS), Key Laboratory of Nanosystem and Hierarchical Fabrication (CAS), National Center for Nanoscience and Technology;2School of Metallurgy and Environment, Central South University;3University of Chinese Academy of Sciences;4Institute for Energy Research, Jiangsu University;5Department of Materials Science and Engineering, University of Science and Technology of China;6School of Physics and Electronics, Central South University;7Solar Energy Research Institute of Singapore, National University of Singapore;8School of Physical Science and Technology, Lanzhou University;9Key Laboratory of Polar Materials and Devices, Department of Electronic Science, School of Physics and Electronic Science, East China Normal University;10School of Materials and Energy, University of Electronic Science and Technology of China收起
来源Science Bulletin
出版年2021
期号第4期
摘要
近几年,全无机钙铁矿太阳电池因其优异的热稳定性而受到广泛关注.尽管全无机钙铁矿材料可以耐受400℃以上的高温,热稳足性远远优于有机无机杂化钙钛矿材料,但其较大的禁带宽度限制了全无机钙钛矿太阳电池对光谱的利用范围,进而限制了太阳电池的效率.将有机体异质结与钙钛矿集成构筑集成太阳电池可以有效拓宽太阳电池的光谱响应范围.基于此概念,本文采用一种有机聚合物给体材料PTB7-Th,集成太阳电池结构获得了高性能的全无机钙钛矿CsPbI2Br太阳电池.结果表明,PTB7-Th可将CsPbI2Br太阳电池的光谱响应范围拓宽至770 nm;进一步对PTB7-Th掺杂锂盐提高空穴迁移率后,CsPbI2Br太阳电池在680~770 nm处的光电响应有显著提升.最终,CsPbI2Br太阳电池获得了14.63%的光电转换效率.

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