Wang Chengbo, Gu Feidan, Zhao Ziran, Rao Haixia, Qiu Yaming, Cai Zelun, Zhan Ge, Li Xiaoyue, Sun Boxun, Yu Xiao, Zhao Boqin, Liu Zhiwei, Bian Zuqiang, Huang Chunhui
Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China.
Adv Mater. 2020 Aug;32(31):e1907623. doi: 10.1002/adma.201907623. Epub 2020 Jun 25.
The development of tin (Sn)-based perovskite solar cells (PSCs) is hindered by their lower power conversion efficiency and poorer stability compared to the lead-based ones, which arise from the easy oxidation of Sn to Sn . Herein, phenylhydrazine hydrochloride (PHCl) is introduced into FASnI (FA = NH CH NH ) perovskite films to reduce the existing Sn and prevent the further degradation of FASnI , since PHCl has a reductive hydrazino group and a hydrophobic phenyl group. Consequently, the device achieves a record power conversion efficiency of 11.4% for lead-free PSCs. Besides, the unencapsulated device displays almost no efficiency reduction in a glove box over 110 days and shows efficiency recovery after being exposed to air, due to a proposed self-repairing trap state passivation process.
与铅基钙钛矿太阳能电池相比，锡（Sn）基钙钛矿太阳能电池（PSC）的功率转换效率较低且稳定性较差，这阻碍了其发展，而这些问题源于Sn易于氧化为Sn 。在此，将盐酸苯肼（PHCl）引入到FASnI （FA = NH CH NH ）钙钛矿薄膜中，以还原现有的Sn并防止FASnI 进一步降解，因为PHCl具有还原性的肼基和疏水性的苯基。因此，该器件实现了无铅PSC创纪录的11.4%的功率转换效率。此外，未封装的器件在手套箱中110多天几乎没有效率降低，并且在暴露于空气后显示出效率恢复，这归因于所提出的自修复陷阱态钝化过程。
