Regulating crystallization and retarding oxidation in Sn-Pb perovskite via 1D cation engineering for high performance all-perovskite tandem solar cells  

作　　者：Ranran Liu Xin Zheng Zaiwei Wang Miaomiao Zeng Chunxiang Lan Shaomin Yang Shangzhi Li Awen Wang Min Li Jing Guo Xuefei Weng Yaoguang Rong Xiong Li 

机构地区：[1]Michael Grätzel Center for Mesoscopic Solar Cells,Wuhan National Laboratory for Optoelectronics,Huazhong University of Science and Technology,Wuhan 430074,Hubei,China [2]Institute of Technology for Carbon Neutrality,Shenzhen Institute of Advanced Technology,Chinese Academy of Sciences,Shenzhen 518055,Guangdong,China [3]School of Chemistry,Chemical Engineering and Life Sciences,State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology,430070,Hubei,China [4]Suzhou Institute of Nano-Tech and Nano-Bionics(SINANO),Chinese Academy of Sciences,Suzhou 215123,Jiangsu,China [5]School of Physics and Optoelectronic Engineering,Hainan University,Haikou 570228,Hainan,China

出　　处：《Journal of Energy Chemistry》2025年第1期646-652,共7页能源化学(英文版)

基　　金：National Key Research and Development Program of China (2022YFB420030);National Natural Science Foundation of China (2227903);Innovation Project of Optics Valley Laboratory (OVL2021BG008);Foundation of State Key Laboratory of New Textile Materials and Advanced Processing Technologies (FZ2021011)。

摘　　要：All-perovskite tandem solar cells have the potential to surpass the theoretical efficiency limit of single junction solar cells by reducing thermalization losses.However,the challenges encompass the oxidation of Sn^(2+)to Sn^(4+)and uncontrolled crystallization kinetics in Sn-Pb perovskites,leading to nonradiative recombination and compositional heterogeneity to decrease photovoltaic efficiency and operational stability.Herein,we introduced an ionic liquid additive,1-ethyl-3-methylimidazolium iodide (EMIMI) into Sn-Pb perovskite precursor to form low-dimensional Sn-rich/pure-Sn perovskites at grain boundaries,which mitigates oxidation of Sn^(2+)to Sn^(4+)and regulates the film-forming dynamics of Sn/Pb-based perovskite films.The optimized single-junction Sn-Pb perovskite devices incorporating EMIMI achieved a high efficiency of 22.87%.Furthermore,combined with wide-bandgap perovskite sub-cells in tandem device,we demonstrate 2-terminal all-perovskite tandem solar cells with a power conversion efficiency of 28.34%,achieving improved operational stability.

关 键 词：All-perovskite tandem solar cells Sn-Pb perovskite 1D Regulated crystallization ANTIOXIDATION 

分 类 号：TG1[金属学及工艺—金属学]