文献类型：期刊文献

英文题名：Phase-Stable Wide-Bandgap Perovskites with 2D/3D Structure for All-Perovskite Tandem Solar Cells

作者：Zhou, Jie[1];Wen, Tianyu[1];Sun, Jinglin[1];Shi, Zijin[2];Zou, Can[2];Shen, Zhichao[3];Li, Yawen[4];Wang, Yanbo[3];Lin, Yuze[4];Yang, Shuang[2];Liu, Feng[1];Yang, Zhibin[1]

机构：[1]Shanghai Jiao Tong Univ, Sch Chem & Chem Engn, Shanghai 200240, Peoples R China;[2]East China Univ Sci & Technol, Key Lab Ultrafine Mat, Shanghai Engn Res Ctr Hierarch Nanomat, Sch Mat Sci & Engn,Minist Educ, Shanghai 200237, Peoples R China;[3]Shanghai Jiao Tong Univ, State Key Lab Met Matrix Composites, Shanghai 200240, Peoples R China;[4]Chinese Acad Sci, Beijing Natl Lab Mol Sci, CAS Key Lab Organ Solids, Inst Chem, Beijing 100190, Peoples R China

年份：2024

卷号：9

期号：5

起止页码：1984

外文期刊名：ACS ENERGY LETTERS

收录：;EI(收录号：20241515902385);WOS:【SCI-EXPANDED(收录号:WOS:001197342500001)】；

基金：This work was sponsored by National Key Research and Development Program of China (2020YFB1506400), Shanghai Pujiang Program (20PJ1406900), and Shanghai Pilot Program for Basic Research (22TQ1400100-5). We thank the Dr. Xiaomin Li from Instrumental Analysis Center of Shanghai Jiao Tong University for conducting SEM and PL mapping measurements.

语种：英文

外文关键词：Activation energy - Conversion efficiency - Energy gap - Open circuit voltage - Perovskite solar cells - Phase separation

摘要：All-perovskite tandem solar cells have exhibited greater potential in achieving power conversion efficiencies that are higher than those of single-junction devices. However, commonly used I/Br mixed wide-bandgap (WBG) perovskites, as an important component in the tandem device, always show a photoinduced halide phase segregation, which results in a large open-circuit voltage deficit and low photostability of the final all-perovskite tandem solar cells. In this work, we successfully stabilized the phase of the WBG perovskite by constructing a 2D wrapped 3D structure via introducing larger organic cation 2-(4-fluorophenyl)ethylamine hydroiodide, which has a high activation energy of ion migration to suppress the halide phase segregation. The phase-stable WBG perovskite solar cells achieved a high open-circuit voltage of 1.35 V with a power conversion efficiency of 19.4% and retain 92.1% of their initial value after 500 h of AM1.5G illumination. Finally, the constructed all-perovskite tandem solar cells achieved a high efficiency of 27%.