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Synergistic passivation of defects for inorganic perovskite solar cells with reduced open-circuit voltage deficiency

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Abstract

Full-inorganic CsPb(IxBr1-x)3 (0 < x < 1) optoelectronic devices have given rise to widespread interest of researchers owing to their excellent photovoltaic properties and promising thermal stability. However, defects at the interface between the electron transport layer (ETL) and the perovskite layer cause the open-circuit voltage (VOC) deficiency for inorganic perovskite solar cells (PSC). In this work, Baclofen (BCF), with carboxy group, amidogen group, and Cl in its molecule, is used as an interlayer between SnO2 and CsPb(IxBr1-x)3 inorganic perovskite. It is proved that the BCF can not only be beneficial for the growth of perovskite film but also act as a passivation layer for the SnO2/perovskite (PSK) interface, which significantly improves the open-circuit voltage of PSCs. Finally, a high VOC of 1.31 V and a power conversion efficiency (PCE) of 15.36% are realized for our BCF-treated PSCs.

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Data and code availability

All data are available from the corresponding authors, please contact yuxuegong@zju.edu.cn.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Nos. 62025403 and 61721005), the Natural Science Foundation of Zhejiang Province (No. LD22E020001), “Pioneer” and “Leading Goose” R&D Program of Zhejiang (No. 2022C01215) and the Fundamental Research Funds for the Central Universities (226-2022-00200).

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  1. Ying Wang and Qiufeng Ye have contributed equally to this work.

Authors and Affiliations

  1. State Key Laboratory of Silicon and Advanced Semiconductor Materials and School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, Zhejiang, China

    Ying Wang, Pengjie Hang, Yuxin Yao, Biao Li, Chenxia Kan, Daoyong Zhang, Xuegong Yu & Deren Yang

  2. School of Mathmatical Information, Shaoxing University, Shaoxing, 312000, Zhejiang, China

    Qiufeng Ye

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Contributions

Ying Wang and Qiufeng Ye contributed equally to this work. Xuegong Yu and Deren Yang supervised the whole project. Ying Wang and Qiufeng Ye conceived the idea and drafted the manuscript. Ying Wang and Qiufeng Ye fabricated and performed the characterization of solar cells. Pengjie Hang contributed to the FTIR measurements. Yuxin Yao contributed to the PL measurements. Biao Li contributed to the TRPL measurements. Chenxia Kan contributed to the SEM measurements. Daoyong Zhang contributed to the EQE measurements. Xuegong Yu and Deren Yang revised the manuscript. All authors contributed to the discussion of the paper.

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Correspondence to Xuegong Yu or Deren Yang.

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Wang, Y., Ye, Q., Hang, P. et al. Synergistic passivation of defects for inorganic perovskite solar cells with reduced open-circuit voltage deficiency. J Mater Sci 58, 14807–14816 (2023). https://doi.org/10.1007/s10853-023-08943-0

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