题目：

Methylthio Substituent in SAM Constructing Regulatory Bridge with Photovoltaic Perovskites

作者：

Chun-Hao Chen^1#, Gui-Wang Liu^1#, Xin Chen^1#, Caner Deger², Run-Jun Jin¹, Kai-Li Wang¹, Jing Chen¹, Yu Xia¹, Lei Huang¹, Ilhan Yavuz², Jian Fan¹*, and Zhao-Kui Wang¹*

单位：

¹Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou 215123, China.

²Dpartment of Physics, Marmara University, Ziverbey, Kadikoy, Istanbul 34722, Turkey.

摘要：

Inverted (p-i-n) perovskite solar cells (PSCs) have experienced remarkable advancements in recent years, which is largely attributed to the development of novel hole-transport layer (HTL) self-assembled monolayer (SAM) materials. Methoxy (MeO-) groups are typically introduced into SAM materials to enhance their wettability and effectively passivate the perovskite buried interface. However, MeO-based SAM materials exhibit a mismatch in highest occupied molecular orbital (HOMO) levels with perovskite layer due to the strong electron-donating capability of methoxy group. In this work, we introduced a methylthio (MeS-) substituent that is superior to methoxy as a highly versatile self-assembled molecular design strategy. As a soft base, sulfur atom forms a stronger Pb-S bond than oxygen. Additionally, within the CbzPh series of SAM materials, MeS-CbzPh demonstrates a more optimal HOMO level and enhanced hole transport properties. Consequently, the MeS-CbzPh HTL based device achieved an impressive power conversion efficiency (PCE) of 26.01% and demonstrated high stability, retaining 93.3% efficiency after 1000 hours of maximum power point tracking (MPPT). Moreover, in comparison with the commonly used 4PACz-based SAM molecular series, MeS-4PACz also exhibited the best performance among its peers. Our work provides valuable insights for the molecular design of SAM materials, offering a highly versatile functional substituent group.

影响因子：

16.1

分区情况：

一区

链接：

https://doi.org/10.1002/anie.202419375

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