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Research Article | Open Access

Sb2Se3 as a bottom cell material for efficient perovskite/Sb2Se3 tandem solar cells

Zhiyuan Cai1,Jia Sun2,Huiling Cai1Yuehao Gu1Rongfeng Tang1Changfei Zhu1Paifeng Luo2( )Tao Chen1( )
Hefei National Research Center for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei 230026, China
School of Materials Science and Engineering, Hefei University of Technology, Hefei 230026, China

Zhiyuan Cai and Jia Sun contributed equally to this work.

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Abstract

Antimony selenide (Sb2Se3) semiconducting material possesses a band gap of 1.05–1.2 eV and has been widely applied in single-junction solar cells. Based on its band gap, Sb2Se3 can also be used as the bottom cell absorber material in tandem solar cells. More importantly, Sb2Se3 solar cells exhibit excellent stability with nontoxic compositional elements. The band gap of organic–inorganic hybrid perovskite is tunable over a wide range. In this work, we demonstrate for the first time a perovskite/antimony selenide four-terminal tandem solar cell with a specially designed and fabricated transparent electrode for an optimized spectral response. By adjusting the thickness of the transparent electrode layer of the top cell, the wide-band-gap perovskite top solar cell achieves an efficiency of 17.88%, while the optimized antimony selenide bottom cell delivers a power conversion efficiency of 7.85% by introducing a double electron transport layer. Finally, the four-terminal tandem solar cell achieves an impressive efficiency exceeding 20%. This work provides a new tandem device structure and demonstrates that antimony selenide is a promising absorber material for bottom cell applications in tandem solar cells.

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Energy Materials and Devices
Article number: 9370027
Cite this article:
Cai Z, Sun J, Cai H, et al. Sb2Se3 as a bottom cell material for efficient perovskite/Sb2Se3 tandem solar cells. Energy Materials and Devices, 2024, 2(1): 9370027. https://doi.org/10.26599/EMD.2024.9370027

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Received: 22 January 2024
Revised: 20 February 2024
Accepted: 20 February 2024
Published: 04 March 2024
© The Author(s) 2024. Published by Tsinghua University Press.

The articles published in this open access journal are distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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