Issue

Vol. 15 (2023)

4-Terminal Inorganic Perovskite/Organic Tandem Solar Cells Offer 22% Efficiency

https://doi.org/10.1007/s40820-022-00995-2
Ling Liu
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
Hanrui Xiao
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
Ke Jin
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
Zuo Xiao
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
Xiaoyan Du
School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, People’s Republic of China
Keyou Yan
School of Environment and Energy, South China University of Technology, Guangzhou 510000, People’s Republic of China
Feng Hao
School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 610054, People’s Republic of China
Qinye Bao
School of Physics and Electronic Science, East China Normal University, Shanghai 200241, People’s Republic of China
Chenyi Yi
State Key Laboratory of Power System, Department of Electrical Engineering, Tsinghua University, Beijing 100084, People’s Republic of China
Fangyang Liu
School of Metallurgy and Environment, Central South University, Changsha 410083, People’s Republic of China
Wentao Wang
School of Materials Science and Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, People’s Republic of China
Chuantian Zuo
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
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

Corresponding Author: Liming Ding

ding@nanoctr.cn

Nano-Micro Letters, Vol. 15 (2023), Article Number: 23

Abstract

After fast developing of single-junction perovskite solar cells and organic solar cells in the past 10 years, it is becoming harder and harder to improve their power conversion efficiencies. Tandem solar cells are receiving more and more attention because they have much higher theoretical efficiency than single-junction solar cells. Good device performance has been achieved for perovskite/silicon and perovskite/perovskite tandem solar cells, including 2-terminal and 4-terminal structures. However, very few studies have been done about 4-terminal inorganic perovskite/organic tandem solar cells. In this work, semi-transparent inorganic perovskite solar cells and organic solar cells are used to fabricate 4-terminal inorganic perovskite/organic tandem solar cells, achieving a power conversion efficiency of 21.25% for the tandem cells with spin-coated perovskite layer. By using drop-coating instead of spin-coating to make the inorganic perovskite films, 4-terminal tandem cells with an efficiency of 22.34% are made. The efficiency is higher than the reported 2-terminal and 4-terminal inorganic perovskite/organic tandem solar cells. In addition, equivalent 2-terminal tandem solar cells were fabricated by connecting the sub-cells in series. The stability of organic solar cells under continuous illumination is improved by using semi-transparent perovskite solar cells as filter.


Highlights:


1 4-Terminal inorganic perovskite/organic tandem solar cells were made by using semi-transparent inorganic perovskite solar cells and narrow-bandgap organic solar cells as the sub-cells, yielding a power conversion efficiency of 22.34%, which is the highest efficiency for inorganic perovskite/organic tandem solar cells.
2 Inorganic perovskite solar cells made by drop-coating (self-spreading) gave much higher power conversion efficiency than the cells made by spin-coating, enabling perovskite/organic tandem solar cells with higher efficiency.

Keywords

4-Terminal tandem solar cells Inorganic perovskite solar cells Organic solar cells Semitransparent Drop-coating
Liu, Ling, Hanrui Xiao, Ke Jin, Zuo Xiao, Xiaoyan Du, Keyou Yan, Feng Hao, Qinye Bao, Chenyi Yi, Fangyang Liu, Wentao Wang, Chuantian Zuo, and Liming Ding. 2022. “4-Terminal Inorganic Perovskite/Organic Tandem Solar Cells Offer 22% Efficiency”. Nano-Micro Letters 15 (December):23. https://doi.org/10.1007/s40820-022-00995-2.
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