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

Rui-Yun Hsu (), Yeong-Lin Lai (), Yung-Hua Chou and Wei-Jhe Syu
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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

Energies, 2024, vol. 17, issue 4, 1-13

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.

Keywords: perovskite; bilayer ETL; solar cell (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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