A donor–acceptor-type hole-selective contact reducing non-radiative recombination losses in both subcells towards efficient all-perovskite tandems

Jingwei Zhu, Yi Luo, Rui He, Cong Chen (), Yang Wang (), Jincheng Luo, Zongjin Yi, Jarla Thiesbrummel, Changlei Wang, Felix Lang, Huagui Lai, Yuliang Xu, Juncheng Wang, Zhihao Zhang, Wenqing Liang, Guangyao Cui, Shengqiang Ren, Xia Hao, Hao Huang, Ye Wang, Fang Yao, Qianqian Lin, Lili Wu, Jingquan Zhang, Martin Stolterfoht, Fan Fu and Dewei Zhao ()
Additional contact information
Jingwei Zhu: Sichuan University
Yi Luo: Sichuan University
Rui He: Sichuan University
Cong Chen: Sichuan University
Yang Wang: Strait Institute of Flexible Electronics (SIFE, Future Technologies), Fujian Normal University and Strait Laboratory of Flexible Electronics (SLoFE)
Jincheng Luo: Sichuan University
Zongjin Yi: Sichuan University
Jarla Thiesbrummel: University of Potsdam
Changlei Wang: Soochow University
Felix Lang: University of Potsdam
Huagui Lai: Laboratory for Thin Films and Photovoltaics, Empa-Swiss Federal Laboratories for Materials Science and Technology
Yuliang Xu: Sichuan University
Juncheng Wang: Sichuan University
Zhihao Zhang: Sichuan University
Wenqing Liang: Sichuan University
Guangyao Cui: Sichuan University
Shengqiang Ren: Sichuan University
Xia Hao: Sichuan University
Hao Huang: Guangxi University
Ye Wang: Zhengzhou University
Fang Yao: Wuhan University
Qianqian Lin: Wuhan University
Lili Wu: Sichuan University
Jingquan Zhang: Sichuan University
Martin Stolterfoht: University of Potsdam
Fan Fu: Laboratory for Thin Films and Photovoltaics, Empa-Swiss Federal Laboratories for Materials Science and Technology
Dewei Zhao: Sichuan University

Nature Energy, 2023, vol. 8, issue 7, 714-724

Abstract: Abstract The efficiency of all-perovskite tandem solar cells has surpassed that of single-junction perovskite solar cells, yet they still suffer from interfacial non-radiative recombination losses. Charge-selective materials that can reduce such losses as well as fabrication cost “applicable” to both subcells should be developed. Here we design a donor–acceptor-type molecule, MPA2FPh-BT-BA (2F), as a hole-selective contact suitable to both wide-bandgap (WBG) and low-bandgap (LBG) subcells for high-performance all-perovskite tandem solar cells. In the WBG cell, 2F enables efficient hole extraction and minimizes interfacial non-radiative recombination losses by passivating interfacial defects. In the LBG cell, 2F suppresses interfacial losses, regulates the crystal growth and enhances Sn–Pb perovskite film quality. As a result, 2F-treated WBG and LBG devices yield efficiencies of 19.33% (certified 19.09%) and 23.24%, respectively, enabling monolithic all-perovskite tandem solar cells with an efficiency of 27.22% (certified 26.3%) and improved operational stability.

Date: 2023
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DOI: 10.1038/s41560-023-01274-z

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