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Improving Carrier Transport Behavior in a Bilayer ETL for Enhanced Efficiency of Perovskite Solar Cells: An Investigation

Author

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  • Rui-Yun Hsu

    (Department of Electrical Engineering, National University of Kaohsiung, Kaohsiung 811, Taiwan)

  • Yeong-Lin Lai

    (Department of Mechatronics Engineering, National Changhua University of Education, Changhua 500, Taiwan)

  • Yung-Hua Chou

    (Department of Mechatronics Engineering, National Changhua University of Education, Changhua 500, Taiwan)

  • Wei-Jhe Syu

    (Department of Mechatronics Engineering, National Changhua University of Education, Changhua 500, Taiwan)

Abstract

Perovskite solar cells (PSCs) are currently among the most promising solar cell technologies. A key component influencing their efficiency and stability is the electron transport layer (ETL). This study examined the carrier transport properties of various ETL materials, including TiO 2 , SnO 2 , and TiO 2 /SnO 2 bilayer ETLs, to understand their effects on PSC performance. The study proposed a hypothesis that the bilayer design, integrating TiO 2 and SnO 2 , enhances performance, and it used experimental results to substantiate this. Through analysis and discussion of the ETLs, the interface between perovskite (PVSK) and ETLs, and other PSC components, we gained insights into the carrier transport dynamics in PSCs with different ETL configurations. Our findings indicate that the TiO 2 /SnO 2 bilayer ETL structure can significantly improve PSC performance by reducing current leakage, improving carrier transport, and minimizing carrier recombination. This enhancement is quantified by the increase in efficiency from 13.58% with a single-layer TiO 2 ETL to 20.49% with the bilayer ETL.

Suggested Citation

  • Rui-Yun Hsu & Yeong-Lin Lai & Yung-Hua Chou & Wei-Jhe Syu, 2024. "Improving Carrier Transport Behavior in a Bilayer ETL for Enhanced Efficiency of Perovskite Solar Cells: An Investigation," Energies, MDPI, vol. 17(4), pages 1-13, February.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:4:p:871-:d:1338259
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    4. Renxing Lin & Yurui Wang & Qianwen Lu & Beibei Tang & Jiayi Li & Han Gao & Yuan Gao & Hongjiang Li & Changzeng Ding & Jin Wen & Pu Wu & Chenshuaiyu Liu & Siyang Zhao & Ke Xiao & Zhou Liu & Changqi Ma , 2023. "All-perovskite tandem solar cells with 3D/3D bilayer perovskite heterojunction," Nature, Nature, vol. 620(7976), pages 994-1000, August.
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