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

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

doi:10.1007/s40820-023-01090-w

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

Nanomicro Lett. 2023 Apr 30;15(1):111. doi: 10.1007/s40820-023-01090-w.

Authors

Liu Yang^#¹, Yongbin Jin^#¹, Zheng Fang^#², Jinyan Zhang³, Ziang Nan⁴, Lingfang Zheng¹, Huihu Zhuang³, Qinghua Zeng³, Kaikai Liu¹, Bingru Deng¹, Huiping Feng¹, Yujie Luo¹, Chengbo Tian¹, Changcai Cui², Liqiang Xie⁵, Xipeng Xu⁶, Zhanhua Wei⁷

Affiliations

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.
⁵ 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. lqxie@hqu.edu.cn.
⁶ 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. xpxu@hqu.edu.cn.
⁷ 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. weizhanhua@hqu.edu.cn.

^# Contributed equally.

Abstract

Wide-bandgap (WBG) perovskite solar cells suffer from severe non-radiative recombination and exhibit relatively large open-circuit voltage (V_OC) deficits, limiting their photovoltaic performance. Here, we address these issues by in-situ forming a well-defined 2D perovskite (PMA)₂PbCl₄ (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)₂PbCl₄ 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.

Keywords: Bulky cations; Defect passivation; Transparent back electrodes; Wide-bandgap perovskite solar cells.