文献类型：期刊文献

英文题名：Efficient and Stable Surface Passivation of Tin-Lead Perovskite Using Basicity Weakened Oxamide

作者：Ma, Rujun[1];Liu, Jiayi[1];Tang, Haorui[1];Long, Xinwen[1];Zhao, Yun[1];Zhou, Lihui[1];Zhang, Shuo[1];Wu, Yongzhen[1,2,3]

机构：[1]East China Univ Sci & Technol, Frontiers Sci Ctr Materiobiol & Dynam Chem, Inst Fine Chem,Key Lab Adv Mat & Joint Int Res Lab, Sch Chem & Mol Engn,Shanghai Key Lab Funct Mat Che, Shanghai, Peoples R China;[2]Guangxi Lab Low Carbon Technol & Green Chem Adv Ma, 1 Haitun Rd, Qinzhou 535008, Guangxi, Peoples R China;[3]East China Univ Sci & Technol, Ctr Photosensit Chem Engn, Shanghai 200237, Peoples R China

年份：2026

卷号：18

期号：20

起止页码：29304

外文期刊名：ACS APPLIED MATERIALS & INTERFACES

收录：;EI(收录号：20262320844622);WOS:【SCI-EXPANDED(收录号:WOS:001766969700001)】；

基金：The work was supported by Shanghai PilotProgram for Basic Research (22TQ14001001), National Natural Science Foundation of China (22425502, T2488302, W2412114, 22179037, 22509061), Program of Introducing Talents of Discipline to Universities (B16017), Shanghai Sailing Program (24YF2708200), Guangxi Science and Technology Innovation Platform Program ("Leitai" Action Plan-Guangxi Laboratory Capacity Building) (LT2504240035), Shanghai Municipal Science and Technology Major Project (24DX1400200, 24DZ3001003), Fundamental Research Funds for the Central Universities, and China Postdoctoral Science Foundation (BX20240117, 2025M780061). We thank the Research Center of Analysis and Test of East China University of Science and Technology (ECUST).

语种：英文

外文关键词：tin-lead perovskite; all-perovskitetandem solarcells; surface passivation; efficiency; stability

摘要：Tin-lead (Sn-Pb) perovskites, owing to their ideal optical bandgap, have emerged as the preferred material for constructing high-efficiency, low-cost perovskite tandem solar cells (TSCs). Organic amines like ethylenediamine (EDA) have been demonstrated as efficient surface passivation agents for Sn-Pb perovskite due to their ability to chelate tin atoms and selectively remove excess tin from the surface. However, their strong basicity can cause irreversible damage to the surface of Sn-Pb perovskite, compromising interfacial stability and even the long-term device stability. To overcome this limitation, this study introduces basicity weakened oxamide (OAM) as an alternative to EDA for Sn-Pb perovskite surface passivation. Compared to EDA-treated films, the OAM-passivated Sn-Pb perovskite films exhibit a higher photoluminescence quantum yield and superior thermal stability, even under harsh aging conditions of 85 degrees C for 5 days. The champion power conversion efficiency (PCE) was increased from 21.43 to 22.50%, and the OAM-based devices retained 83.35% of their initial PCE after 707 h operation, far surpassing the EDA-treated devices (80% retention after 147 h). When this approach was extended to TSCs, a PCE of 28.10% was achieved alongside a substantial enhancement in operational stability, with the T-90 lifetime (the time to retain 90% of the initial PCE) increasing from 161 to 670 h.