Efficient Semi‑Transparent Wide‑Bandgap Perovskite Solar Cells Enabled by Pure‑Chloride 2D‑Perovskite Passivation  

作　　者：Liu Yang Yongbin Jin Zheng Fang Jinyan Zhang Ziang Nan Lingfang Zheng Huihu Zhuang Qinghua Zeng Kaikai Liu Bingru Deng Huiping Feng Yujie Luo Chengbo Tian Changcai Cui Liqiang Xie Xipeng Xu Zhanhua Wei 

机构地区：[1]Xiamen Key Laboratory of Optoelectronic Materials and Advanced Manufacturing,Institute of Luminescent Materials and Information Displays,College of Materials Science and Engineering,Huaqiao University,Xiamen 361021,People’s Republic of China [2]MOE Engineering Research Center for Brittle Materials Machining,Institute of Manufacturing Engineering,College of Mechanical Engineering and Automation,Huaqiao University,Xiamen 361021,People’s Republic of China [3]Gold Stone(Fujian)Energy Company Limited,Quanzhou 362005,People’s Republic of China [4]Collaborative Innovation Center of Chemistry for Energy Materials,Department of Chemistry,College of Chemistry and Chemical Engineering,Xiamen University,Xiamen 361005,People’s Republic of China

出　　处：《Nano-Micro Letters》2023年第8期35-48,共14页纳微快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(22179042,U21A2078,and 51902110);the Natural Science Foundation of Fujian Province(2020J06021 and 2020J01064).

摘　　要：Wide-bandgap(WBG)perovskite solar cells suffer from severe non-radiative recombination and exhibit relatively large opencircuit voltage(V_(OC))deficits,limiting their photovoltaic performance.Here,we address these issues by in-situ forming a well-defined 2D perovskite(PMA)_(2)PbCl_(4)(phenmethylammonium is referred to as PMA)passivation layer on top of the WBG active layer.The 2D layer with highly pure dimensionality and halide components is realized by intentionally tailoring the side-chain substituent at the aryl ring of the post-treatment reagent.First-principle calculation and single-crystal X-ray diffraction results reveal that weak intermolecular interactions between bulky PMA cations and relatively low cation-halide hydrogen bonding strength are crucial in forming the well-defined 2D phase.The(PMA)_(2)PbCl_(4)forms improved type-I energy level alignment with the WBG perovskite,reducing the electron recombination at the perovskite/hole-transport-layer interface.Applying this strategy in fabricating semi-transparent WBG perovskite solar cells(indium tin oxide as the back electrode),the V_(OC)deficits can be reduced to 0.49 V,comparable with the reported state-of-the-art WBG perovskite solar cells using metal electrodes.Consequently,we obtain hysteresis-free 18.60%-efficient WBG perovskite solar cells with a high V_(OC)of 1.23 V.

关 键 词：Wide-bandgap perovskite solar cells Transparent back electrodes Defect passivation Bulky cations 

分 类 号：TB34[一般工业技术—材料科学与工程] TM914.4[电气工程—电力电子与电力传动]