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iEnergy 2024, 3(1): 39-45 https://doi.org/10.23919/IEN.2024.0001
Article | Open Access | Issue | Published: 31 March 2024

25% – Efficiency flexible perovskite solar cells via controllable growth of SnO2

Show Author's Information Ningyu Ren1,†,  Liguo Tan1,†,  Minghao Li1,†,  Junjie Zhou1,  Yiran Ye1,  Boxin Jiao1,  Liming Ding2,  Chenyi Yi1( )
State Key Laboratory of Power System Operation and Control, Department of Electrical Engineering, Tsinghua University, Beijing 100084, China
Center for Excellence in Nanoscience (CAS), Key Laboratory of Nanosystem and Hierarchical Fabrication (CAS), National Center for Nanoscience and Technology, Beijing 100190, China

† These authors contributed equally to this work.

Keywords:
electron transport layer, SnO2, chemical bath deposition, Flexible perovskite solar cells
Cite this article:
Ren N, Tan L, Li M, et al. 25% – Efficiency flexible perovskite solar cells via controllable growth of SnO2. iEnergy, 2024, 3(1): 39-45. https://doi.org/10.23919/IEN.2024.0001
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Abstract Full text About this article

High power conversion efficiency (PCE) flexible perovskite solar cells (FPSCs) are highly desired power sources for aerospace crafts and flexible electronics. However, their PCEs still lag far behind their rigid counterparts. Herein, we report a high PCE FPSC by controllable growth of a SnO2 electron transport layer through constant pH chemical bath deposition (CBD). The application of SnSO4 as tin source enables us to perform CBD without strong acid, which in turn makes it applicable to acid-sensitive flexible indium tin oxide. Furthermore, a mild and controllable growth environment leads to uniform particle growth and dense SnO2 deposition with full coverage and reproducibility, resulting in a record PCE of up to 25.09% (certified 24.90%) for FPSCs to date. The as-fabricated FPSCs exhibited high durability, maintaining over 90% of their initial PCE after 10000 bending cycles.


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About this article

25% – Efficiency flexible perovskite solar cells via controllable growth of SnO2

Show Author's information Ningyu Ren1,†, Liguo Tan1,†, Minghao Li1,†, Junjie Zhou1, Yiran Ye1, Boxin Jiao1, Liming Ding2, Chenyi Yi1( )
State Key Laboratory of Power System Operation and Control, Department of Electrical Engineering, Tsinghua University, Beijing 100084, China
Center for Excellence in Nanoscience (CAS), Key Laboratory of Nanosystem and Hierarchical Fabrication (CAS), National Center for Nanoscience and Technology, Beijing 100190, China

† These authors contributed equally to this work.

Abstract

High power conversion efficiency (PCE) flexible perovskite solar cells (FPSCs) are highly desired power sources for aerospace crafts and flexible electronics. However, their PCEs still lag far behind their rigid counterparts. Herein, we report a high PCE FPSC by controllable growth of a SnO2 electron transport layer through constant pH chemical bath deposition (CBD). The application of SnSO4 as tin source enables us to perform CBD without strong acid, which in turn makes it applicable to acid-sensitive flexible indium tin oxide. Furthermore, a mild and controllable growth environment leads to uniform particle growth and dense SnO2 deposition with full coverage and reproducibility, resulting in a record PCE of up to 25.09% (certified 24.90%) for FPSCs to date. The as-fabricated FPSCs exhibited high durability, maintaining over 90% of their initial PCE after 10000 bending cycles.

Keywords: electron transport layer, SnO2, chemical bath deposition, Flexible perovskite solar cells

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Publication history
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Publication history

Received: 19 February 2024
Revised: 05 March 2024
Accepted: 15 March 2024
Published: 31 March 2024
Issue date: March 2024

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© The author(s) 2024.

Acknowledgements

Acknowledgements

This work is financially supported by the National Key Research and Development Program of China (2022YFB3803304), National Natural Science Foundation of China (U23B20153, U23A20138), Tsinghua University Initiative Scientific Research Program (20221080065, 20223080044), Independent Innovative Research Program (ZK20230101), Department of Electrical Engineering, Tsinghua University, State Key Laboratory of Power System and Generation Equipment (Nos. SKLD21Z03 and SKLD20M03); China Postdoctoral Science Foundation (2023M741888), The Chinese Thousand Talents Program for Young Professionals; State Grid Corporation of China, National Bio Energy Co. Ltd., grant no. 52789922000D.

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This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).

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