文献类型：期刊文献

英文题名：Conjugated Self-Assembled Monolayer as Stable Hole-Selective Contact for Inverted Perovskite Solar Cells

作者：Zhang, Shuo[1];Wu, Ruihan[1];Mu, Chenkai[1];Wang, Yanbo[2];Han, Liyuan[2];Wu, Yongzhen[1];Zhu, Wei-Hong[1]

机构：[1]East China Univ Sci & Technol, Key Lab Adv Mat & Joint Int Res Lab Precis Chem &, Shanghai Key Lab Funct Mat Chem,Sch Chem & Mol, Frontiers Sci Ctr Mat & Dynam Chem,Inst Fine Chem, Shanghai 200237, Peoples R China;[2]Shanghai Jiao Tong Univ, State Key Lab Met Matrix Composites, Shanghai 200240, Peoples R China

年份：2022

卷号：4

期号：10

起止页码：1976

外文期刊名：ACS MATERIALS LETTERS

收录：;EI(收录号：20224212903786);WOS:【SCI-EXPANDED(收录号:WOS:000854107300001)】；

基金：This work was supported by the National Natural Science Foundation of China (22179037, 52102281), Shanghai Municipal Science and Technology Major Project (2018SHZDZX03, 21JC1401700), Programmer of Introducing Talents of Discipline to Universities (B16017), Innovation Program of Shanghai Municipal Education Commission (15XD1501400, 2021-01-07-00-02-E00107), and the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：Bromine compounds - Hole mobility - Lead compounds - Organic polymers - Perovskite - Self assembled monolayers

摘要：The alkyl linker-based self-assembled monolayer (SAM) has emerged as an efficient hole-selective contact (HSC) for inverted perovskite solar cells (PSCs). Despite being effective in hole-extraction and interfacial passivation, its hole-transporting capability is limited by the insulating alkyl linker, along with poor stability due to the isolated and nonconjugated electron-rich moiety. Here, we report a series of conjugated SAMs that exhibit excellent photo-and electrical stabilities. The conjugated molecular structure not only enhances charge transport but also stabilizes the electron-rich arylamines through electron/charge delocalization. Moreover, it enables convenient modulation of frontier orbital energy levels for interfacial band alignment. By scrutinization of the conjugation-linker and hole-transporting head, an optimal conjugated SAM (MPA-Ph-CA) in combination with the standard triple cation perovskite Cs-0.05(FA(0.92)MA(0.08))(0.95)Pb(I0.92Br0.08)(3) achieved an efficient inverted PSC with a power conversion efficiency (PCE) of 22.53% (certified 22.12%). Moreover, the MPA-Ph-CA based devices showed excellent stability, retaining over 95% of their initial PCEs under one sun constant irradiation for 800 h. The synchronously enhanced efficiency and stability suggest that conjugated SAM-based HSCs are promising for further advancing inverted PSCs.