题目： | methylthio substituent in sam constructing regulatory bridge with photovoltaic perovskites |
作者： | chun-hao chen1#, gui-wang liu1#, xin chen1#, 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： | 责任编辑：杜欣 |
