Interfacial Engineering via Self-Assembled Thiol Silane for High Efficiency and Stability Perovskite Solar Cells,Solar RRL

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Interfacial Engineering via Self-Assembled Thiol Silane for High Efficiency and Stability Perovskite Solar Cells
Solar RRL ( IF 6.0 ) Pub Date : 2021-04-08 , DOI: 10.1002/solr.202100128
Yunfan Shi ₁ , Huijie Zhang ₁ , Xiaolan Tong ₁ , Xiaoyi Hou ₁ , Fangjie Li ₁ , Yunxiao Du ₁ , Shaofu Wang ₁ , Qilin Zhang ₁ , Pei Liu ₁ , Xingzhong Zhao ₁

Affiliation

Self-assemble monolayer (SAM) has been proven to be an effective interfacial layer to improve the performance of perovskite solar cells (PSCs). Herein, a 3-mercaptopropyltrimethoxysilane (MPTMS) SAM is used as an interlayer between the SnO₂ electron-transporting layer (ETL) and the perovskite film to modify fully air-processed PSCs. In the devices prepared by the two-step method, this MPTMS SAM interlayer can slow down the crystal growth of perovskite and smooth the surface of the SnO₂ ETL, which could induce a high-quality perovskite absorber. In contrast, it can passivate the SnO₂/perovskite interface to enhance the extraction efficiency of photogenerated electrons and restrain carrier recombination. As a result, with suitable MPTMS SAM modification, the average power conversion efficiency (PCE) of the fully air-processed PSCs is significantly improved from 16.62% to 18.75%, and the best device achieved a champion PCE over 20%. Moreover, the modified PSCs exhibit a good stability in ambient air. This research shows that the interface modification of MPTMS SAM is a feasible method for high-performance PSCs.

中文翻译：

通过自组装硫醇硅烷的界面工程用于高效和稳定的钙钛矿太阳能电池

自组装单层（SAM）已被证明是提高钙钛矿太阳能电池（PSC）性能的有效界面层。在本文中，3-巯基丙基三甲氧基硅烷 (MPTMS) SAM 用作 SnO ₂电子传输层 (ETL) 和钙钛矿膜之间的夹层，以改性完全空气处理的 PSC。在通过两步法制备的器件中，这种 MPTMS SAM 夹层可以减缓钙钛矿的晶体生长并平滑 SnO ₂ ETL的表面，这可以诱导高质量的钙钛矿吸收体。相反，它可以钝化 SnO ₂/钙钛矿界面以提高光生电子的提取效率并抑制载流子复合。因此，通过适当的 MPTMS SAM 修改，完全空气处理的 PSC 的平均功率转换效率 (PCE) 从 16.62% 显着提高到 18.75%，最佳设备实现了超过 20% 的冠军 PCE。此外，改性 PSC 在环境空气中表现出良好的稳定性。该研究表明，MPTMS SAM 的界面修饰是高性能 PSC 的可行方法。

更新日期：2021-04-08

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