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Ultrathin Glass-Based Perovskite Solar Cells Employing Bilayer Electron Transport Layer

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Abstract

In recent studies, flexible perovskite solar cells (PSCs) have exhibited high power conversion efficiency (PCE) coupled with remarkable mechanical stability. However, the conventional polymer substrates used in flexible PSCs possess high permeability to moisture and oxygen, leading to the rapid degradation of perovskite materials. In this work, we address these issues by employing ultrathin glass (UTG) substrates, which provide moisture impermeability while retaining flexibility. Additionally, we introduce a strategically designed SnO2/TiO2 bilayer as the electron transport layer (ETL). Our results reveal that PSCs incorporating the bilayer ETL achieve higher PCE than those with a monolayer ETL on conventional glass and UTG substrates. Furthermore, moisture permeability tests demonstrate that PSCs based on UTG substrates sustain their PCE over time, compared to their polymer-based counterparts. These results imply that UTG substrates, combined with a SnO2/TiO2 bilayer ETL, offer a promising solution for developing durable, high-performance, flexible PSCs suitable for long-term applications.

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Acknowledgements

This study is the result of a research project conducted with the funds of the Open R&D program of Korea Electric Power Corporation. (R23XH02) This work was also supported by Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government (MOTIE) (Sector coupling energy industry advancement manpower training program, 20224000000440).

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  1. Wooyeon Kim, Jian Cheng, and Joonwon Choi have contributed equally.

Authors and Affiliations

  1. Department of Chemical Engineering, Hanyang University, Seoul, 04763, Republic of Korea

    Wooyeon Kim, Jian Cheng, Joonwon Choi, Seoyeong Lee, Yongwoo Lee, Doyeon Lee & Min Jae Ko

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  1. Wooyeon Kim
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Correspondence to Min Jae Ko.

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Kim, W., Cheng, J., Choi, J. et al. Ultrathin Glass-Based Perovskite Solar Cells Employing Bilayer Electron Transport Layer. Korean J. Chem. Eng. (2024). https://doi.org/10.1007/s11814-024-00213-2

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