文献类型：期刊文献

英文题名：Bonding Strength Regulates Anchoring-Based Self-Assembly Monolayers for Efficient and Stable Perovskite Solar Cells

作者：Li, Erpeng[1];Liu, Cong[1];Lin, Hongzhen[2];Xu, Xiaojia[1];Liu, Shuaijun[1];Zhang, Shuo[1];Yu, Miaojie[1];Cao, Xiao-Ming[1];Wu, Yongzhen[1];Zhu, Wei-Hong[1]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn,Lab Precis Chem & Mol Engn,Ke, Frontiers Sci Ctr Materiobiol & Dynam Chem,Shangh, Int Joint Res Ctr Green Energy Chem Engn,Inst Fin, Shanghai 200237, Peoples R China;[2]Chinese Acad Sci, Suzhou Inst Nanotech & Nanobion, i Lab, Suzhou 215123, Peoples R China

年份：2021

卷号：31

期号：35

外文期刊名：ADVANCED FUNCTIONAL MATERIALS

收录：;EI(收录号：20212510545381);WOS:【SCI-EXPANDED(收录号:WOS:000663868300001)】；

基金：This work was supported by the National Natural Science Foundation of China (21822504, 21706070), Shanghai Municipal Science and Technology Major Project (2018SHZDZX03), Programmer of Introducing Talents of Discipline to Universities (B16017), Shanghai Science and Technology Committee (17ZR1407400), China Association of Science and Technology (2017QNRC001), and Eastern Scholar (TP2016018).

语种：英文

外文关键词：anchoring based self-assembly; bonding strength; hole transporting materials; monolayer; perovskite solar cells

摘要：Anchoring-based self-assembly (ASA) has emerged as a material-saving and highly scalable strategy to fabricate charge-transporting monolayers for perovskite solar cells (PSCs). However, the interfacial hole-extraction and electron-blocking performances are highly dependent on the compactness of the ASA monolayers, which has been largely ignored though it is very crucial to the efficiency and stability of PSCs. Here, strategically designed hole-transporting molecules with different anchoring groups are incorporated to investigate the effect of bonding strength on monolayer quality and correlate these with the performance of p-i-n structured PSCs. It is unraveled that the anchoring groups with a stronger bonding strength are advantageous for improving the assembly rate, density, and compactness of ASA monolayer, thus enhancing charge collection and suppressing interfacial recombination. The prototypical PSCs based on optimal ASA monolayer achieve a high power conversion efficiency (PCE) of 21.43% (0.09 cm(2)). More encouragingly, when enlarging the device area by tenfold, a comparable PCE of 20.09% (1.0 cm(2)) can be obtained, suggesting that the ASA strategy is practically useful for scaling-up. The robust anchoring of the ASA monolayer also enhances devices stability, retaining 90% of initial PCE after three months. This study provides important insights into the ASA charge-transporting monolayers for efficient and stable PSCs.