文献类型：期刊文献

英文题名：Simultaneous Enhancement of Efficiency and Photostability in Wide-Bandgap Perovskite Solar Cells via Managing Residual PbI with a Phosphoramide Additive

作者：Wang, Songran[1,2];Jin, Pengwei[1,2,3,5];Ji, Xiaoyu[1,2,4];Zhang, Shuo[1,2];Wu, Yongzhen[1,2,3,5]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Inst Fine Chem,Sch Chem & Mol Engn, Feringa Nobel Prize Scientist Joint Res Ctr,Shangh, Frontiers Sci Ctr Materiobiol & Dynam Chem,Joint I, Shanghai 200237, Peoples R China;[3]Guangxi Lab Low Carbon Technol & Green Chem Adv Ma, Qinzhou 535008, Guangxi, Peoples R China;[4]Petrochina Jinxi Petrochem Co, Huludao 125001, Liaoning, Peoples R China;[5]East China Univ Sci & Technol, Ctr Photosensit Chem Engn, Shanghai 200237, Peoples R China

年份：2026

外文期刊名：ACS APPLIED ENERGY MATERIALS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001813632300001)】；

基金：The work was supported by the National Natural Science Foundation of China (22425502, T2488302, W2412114, and 22509061), Funded by the Guangxi Science and Technology Innovation Platform Program ("Leitai" Action Plan - Guangxi Laboratory Capacity Building) (LT2504240035), Shanghai Pilot Program for Basic Research (22TQ14001001), Shanghai Municipal Science and Technology Major Project (24DX1400200 and 24DZ3001003), Fundamental and Interdisciplinary Disciplines Breakthrough Plan of the Ministry of Education of China (JYB2025XDXM404), Program of Introducing Talents of Discipline to Universities (B16017), Shanghai Sailing Program (24YF2708200), Fundamental Research Funds for the Central Universities, and China Postdoctoral Science Foundation (BX20240117 and 2025M780061). We thank the Shanghai Synchrotron Radiation Facility of BL03HB (https://cstr.cn/31124.02.SSRF.BL03HB) for the assistance on GIWAXS measurements, and 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：wide-bandgap perovskite solar cells; residual lead iodide; phosphoramide additive; crystal regulation; defect passivation; photostability

摘要：In wide-bandgap perovskite solar cells (WBG-PSCs), the addition of excess lead salts in a perovskite precursor is a popular strategy for fabricating high-efficiency devices. The presence of lead iodide (PbI2) in perovskite films has been confirmed to enhance the device performance but introduces the intrinsic instability of perovskite under illumination due to its photodecomposition. In this work, we used tri(N,N-tetramethylene)phosphoramide (TPPA) as an additive to manage residual PbI2 in perovskite films, which regulates the crystallization process of mixed-halide perovskites, promotes the formation of high-quality perovskite films, and stabilizes the perovskite films under light irradiation. As a result, WBG-PSCs with a band gap of 1.76 eV achieved a high open-circuit voltage close to 1.34 V and power conversion efficiency (PCE) of 21.4%. Furthermore, the devices with TPPA retained 90% of the initial PCE after 750 h during the maximum power point tracking process, while the control devices only retained 90% of the initial PCE after 270 h.