文献类型：期刊文献

中文题名：超薄聚丙烯腈构建化学稳定锡铅钙钛矿埋底界面及其在叠层电池中的应用

英文题名：Chemically stable buried interfaces in tin-lead perovskite solar cells with a thin polyacrylonitrile interlayer for all-perovskite tandems

作者：Liu, Jiayi[1];Ma, Rujun[1];Tang, Haorui[1];Zhao, Yun[1];Long, Xinwen[1];Zhan, Liqing[1];Zhang, Huidong[1];Zhou, Lihui[1];Liu, Xinyi[2];Liu, Gaoqi[3];Ning, Zhijun[3];Yang, Shuang[2];Zhang, Shuo[1,4];Wu, Yongzhen[1,4]

机构：[1]East China Univ Sci & Technol, Feringa Nobel Prize Scientist Joint Res Ctr, Frontiers Sci Ctr Materiobiol & Dynam Chem,Shangha, Inst Fine Chem,Key Lab Adv Mat,Sch Chem & Mol Engn, Shanghai 200237, Joint Int Res L, Peoples R China;[2]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China;[3]ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China;[4]East China Univ Sci & Technol, Ctr Photosensit Chem Engn, Shanghai 200237, Peoples R China

年份：2026

外文期刊名：SCIENCE CHINA-MATERIALS

收录：;EI(收录号：20262921139445);WOS:【SCI-EXPANDED(收录号:WOS:001822394100001)】；

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

语种：中文

外文关键词：all-perovskite tandems; tin-lead perovskite solar cells; buried interface; polyacrylonitrile

摘要：All-perovskite tandem solar cells (TSCs) hold great promise to surpass the Shockley-Queisser efficiency limit with cost-effectiveness. However, their development is impeded by the instability of narrow-bandgap tin-lead (Sn-Pb) perovskite bottom subcells, which is highly related to detrimental reactions occurring at the buried interface between the Sn-Pb perovskite and the commonly used hole-transporting layer of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS). Herein, we introduce a polyacrylonitrile (PAN) interlayer between PEDOT:PSS and the Sn-Pb perovskite to prevent the degradation of the tin-lead perovskite caused by acidic PSS, thereby enhancing the stability of the buried interface. Furthermore, the PAN interlayer alleviates the tin enrichment and passivates interfacial defects, thus decreasing the energy loss in the Sn-Pb perovskite devices. This interfacial modification enables simultaneous improvements in power conversion efficiency (PCE, from 21.8% to 22.7%) and device operational stability (T-90, the time to retain 90% of the initial PCE, from 250 to 600 h), with the buried interfacial morphology well preserved after several aging conditions. The incorporation of such efficient and stable Sn-Pb subcells into all-perovskite TSCs yields a high PCE of 28.6%, and their operational stability is twofold higher than the control tandem, reaching a T-90 of 700 h, which is one of the best stability results to date.