文献类型：期刊文献

英文题名：Suppressing charge recombination in a methylammonium-free wide-bandgap perovskite film for high-performance and stable perovskite solar cells

作者：Ye, Qiufeng[1,3];Hu, Wenzheng[1];Zhu, Junchi[1];Cai, Ziyu[1];Zhang, Hengkang[1];Dong, Tao[1];Yu, Boyang[1];Chen, Feiyang[1];Wei, Xieli[1];Yao, Bo[1];Dou, Weidong[1];Fang, Zebo[1];Ye, Feng[2];Liu, Zhun[1];Li, Tie[3]

机构：[1]Shaoxing Univ, Zhejiang Engn Res Ctr MEMS, Dept Phys, Shaoxing 312000, Peoples R China;[2]Shaoxing Univ, Shangyu Coll, Shaoxing 312300, Peoples R China;[3]Shanghai Inst Microsyst & Informat Technol, Chinese Acad Sci, Sci & Technol Microsyst Lab, Shanghai 200050, Peoples R China

年份：2024

外文期刊名：ENERGY & ENVIRONMENTAL SCIENCE

收录：SCI-EXPANDED(收录号：WOS:001222923800001)、、EI(收录号：20242116122220)、Scopus(收录号：2-s2.0-85193531085)、WOS

基金：The authors thank Pro. Qi Jiang and Pro. Jiangsheng Xie for their help with the experiments. This work was financially supported by the China Postdoctoral Science Foundation (Grant No. 2022M723281), Natural Science Foundation of Zhejiang Province, China (Grant No. LQ22F040001), Shaoxing Public Welfare project (Grant No. 2023A11002), and also by the Science and Technology Planning Project of Shaoxing City (Grant No. 2022B41001).

语种：英文

外文关键词：Cesium compounds - Conversion efficiency - Crystallinity - Energy gap - Grain boundaries - Heterojunctions - Iodine compounds - Layered semiconductors - Lead compounds - Open circuit voltage - Perovskite solar cells - Rubidium compounds - Solar power generation

外文摘要：Wide-bandgap (WBG) formamidinium-cesium (FA-Cs) hybrid lead iodide-bromide mixed perovskites (similar to 1.7 eV) have gained great attention with the potential of enabling highly efficient tandem photovoltaics when integrated with crystalline silicon and other low-bandgap solar cells. However, their power conversion efficiencies (PCEs) are still insufficient compared to their methylammonium (MA) counterparts, mainly owing to the high open-circuit voltage (V-OC) deficits (>0.43 V). Here, by incorporating rubidium iodide (RbI) in the FA(0.8)Cs(0.2)Pb(I0.75Br0.25)(3) perovskite precursor, the film crystallinity and bulk defects are significantly optimized. In addition, we propose an all-around interface engineering strategy sequentially constructing a surface heterojunction and using trioctylphosphine oxide (TOPO), which can significantly passivate grain boundaries and undercoordinated defects, as well as optimize the energy band. As a result, the target MA-free WBG n-i-p solar cells at 1.685 eV have achieved a record efficiency of 23.35% and a high V-OC of 1.30 V (with a record voltage deficit of 0.385 V). Most importantly, the unencapsulated solar cells also display impressive air storage stability, operating stability and thermal stability. Moreover, a PCE of 19.54% on a 1 cm(2) WBG solar cell and a PCE of 21.31% on a 0.04 cm(2) p-i-n inverted WBG solar cell are also demonstrated.