Issue

Vol. 15 (2023)

Double Layer Composite Electrode Strategy for Efficient Perovskite Solar Cells with Excellent Reverse-Bias Stability

https://doi.org/10.1007/s40820-022-00985-4
Chaofan Jiang
State Key Laboratory of Power System, Department of Electrical Engineering, Tsinghua University, Beijing 100084, People’s Republic of China
Junjie Zhou
State Key Laboratory of Power System, Department of Electrical Engineering, Tsinghua University, Beijing 100084, People’s Republic of China
Hang Li
State Key Laboratory of Power System, Department of Electrical Engineering, Tsinghua University, Beijing 100084, People’s Republic of China
Liguo Tan
State Key Laboratory of Power System, Department of Electrical Engineering, Tsinghua University, Beijing 100084, People’s Republic of China
Minghao Li
State Key Laboratory of Power System, Department of Electrical Engineering, Tsinghua University, Beijing 100084, People’s Republic of China
Wolfgang Tress
Institute of Computational Physics (ICP), ZHAW School of Engineering, Wildbachstr. 21, 8400 Winterthur, Switzerland
Liming Ding
Center for Excellence in Nanoscience (CAS), Key Laboratory of Nanosystem and Hierarchical Fabrication (CAS), National Center for Nanoscience and Technology, Beijing 100190, People’s Republic of China
Michael Grätzel
Laboratory of Photonics and Interfaces, Department of Chemistry and Chemical Engineering, Swiss Federal Institute of Technology Lausanne, 1015 Lausanne, Switzerland
Chenyi Yi
State Key Laboratory of Power System, Department of Electrical Engineering, Tsinghua University, Beijing 100084, People’s Republic of China

Corresponding Author: Chenyi Yi

yicy@mail.tsinghua.edu.cn

Nano-Micro Letters, Vol. 15 (2023), Article Number: 12

Abstract

Perovskite solar cells (PSCs) have become the representatives of next generation of photovoltaics; nevertheless, their stability is insufficient for large scale deployment, particularly the reverse bias stability. Here, we propose a transparent conducting oxide (TCO) and low-cost metal composite electrode to improve the stability of PSCs without sacrificing the efficiency. The TCO can block ion migrations and chemical reactions between the metal and perovskite, while the metal greatly enhances the conductivity of the composite electrode. As a result, composite electrode-PSCs achieved a power conversion efficiency (PCE) of 23.7% (certified 23.2%) and exhibited excellent stability, maintaining 95% of the initial PCE when applying a reverse bias of 4.0 V for 60 s and over 92% of the initial PCE after 1000 h continuous light soaking. This composite electrode strategy can be extended to different combinations of TCOs and metals. It opens a new avenue for improving the stability of PSCs.


Highlights:


1 A composite electrode strategy to fabricate the perovskite solar cells (PSCs) with excellent comprehensive stabilities, particularly reverse-bias stability.
2 A record efficiency of 23.7% (certified 23.2%) for n-i-p PSCs using Cu as the electrode.
3 The strategy can be extended to the combinations of different transparent conducting oxides and low-cost metals.

Keywords

Composite electrode Perovskite solar cells Stability Reverse bias Characterization
Jiang, Chaofan, Junjie Zhou, Hang Li, Liguo Tan, Minghao Li, Wolfgang Tress, Liming Ding, Michael Grätzel, and Chenyi Yi. 2022. “Double Layer Composite Electrode Strategy for Efficient Perovskite Solar Cells With Excellent Reverse-Bias Stability”. Nano-Micro Letters 15 (December):12. https://doi.org/10.1007/s40820-022-00985-4.
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