文献类型：期刊文献

英文题名：Acidity Control of Interface for Improving Stability of All-Perovskite Tandem Solar Cells

作者：Zhou, Jie[1];Qiu, Huihang[1];Wen, Tianyu[1];He, Zhilong[1,2];Zou, Can[3];Shi, Yang[1];Zhu, Lei[1];Chen, Chun-Chao[4];Liu, Gang[2];Yang, Shuang[3];Liu, Feng[1];Yang, Zhibin[1]

机构：[1]Shanghai Jiao Tong Univ, Sch Chem & Chem Engn, Shanghai 200240, Peoples R China;[2]Shanghai Jiao Tong Univ, Sch Elect Informat & Elect Engn, Shanghai 200240, Peoples R China;[3]East China Univ Sci & Technol, Shanghai Engn Res Ctr Hierarch Nanomat, Sch Mat Sci & Engn, Minist Educ,Key Lab Ultrafine Mat, Shanghai 200237, Peoples R China;[4]Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, 20024, Shanghai, Peoples R China

年份：2023

卷号：13

期号：31

外文期刊名：ADVANCED ENERGY MATERIALS

收录：;EI(收录号：20232614315006);WOS:【SCI-EXPANDED(收录号:WOS:001015349400001)】；

基金：Acknowledgements This work was sponsored by National Key Research and Development Program of China (2020YFB1506400) and Shanghai Pujiang Program (20PJ1406900).

语种：英文

外文关键词：interfacial engineering; narrow-bandgap; perovskite solar cells; stability; tandem solar cells

摘要：Developing all-perovskite tandem solar cells has been proved to be an effective approach to boost the efficiency beyond the Shockley-Queisser limit. However, the Sn-based narrow-bandgap (NBG) perovskite solar cells (PSCs) suffer from the relatively low photostability, which limits their further application in all-perovskite tandem solar cells. In this work, the instability of NBG PSCs is found to come from the commonly used acidic hole transporting material PEDOT:PSS, which reacts with the indispensable basic additive SnF2 in the perovskite layer. By acidity control of PEDOT:PSS via aqueous ammonia, the NBG PSCs yield an efficiency of 22.0% with much improved photostability, which can maintain 91.3% of the initial value after 800 h illumination under AM 1.5G. As an application, the corresponding all-perovskite tandem cells exhibit a stabilized efficiency of 25.3% with 92% remaining after 560 h illumination. This work reveals an origin of instability of NBG PSCs and provides an effective approach to enhance the device stability, which can promote the development of all-perovskite tandem solar cells.