journal article·2024-07Open access

3D Conjugated Hole Transporting Materials for Efficient and Stable Perovskite Solar Cells and Modules

Xianfu Zhang, Xuepeng Liu, Yunxuan Ding, Bin Ding, Pengju Shi, Olga A. Syzgantseva, Maria A. Syzgantseva, Zhaofu Fei, Jianlin Chen, Ghadari Rahim, Mingyuan Han, Kai Zhang, Ying Zhou, Keith G. Brooks, Rui Wang, Licheng Sun, Paul J. Dyson, Songyuan Dai, Mohammad Kahaj Khaja Nazeeruddin, Yong Ding

Advanced Materials· Volume 36· Issue 28

Abstract

Abstract The orthogonal structure of the widely used hole transporting material (HTM) 2,2′,7,7′‐tetrakis(N, N‐di‐p‐methoxyphenylamino)−9,9′‐spirobifluorene (Spiro‐OMeTAD) imparts isotropic conductivity and excellent film‐forming capability. However, inherently weak intra‐ and inter‐molecular π–π interactions result in low intrinsic hole mobility. Herein, a novel HTM, termed FTPE‐ST, with a twist conjugated dibenzo(g,p)chrysene core and coplanar 3,4‐ethylenedioxythiophene (EDOT) as extended donor units, is designed to enhance π–π interactions, without compromising on solubility. The three‐dimensional (3D) configuration provides the material multi‐direction charge transport as well as excellent solubility even in 2‐methylanisole, and its large conjugated backbone endows the HTM with a high hole mobility. Moreover, the sulfur donors in EDOT units coordinate with lead ions on the perovskite surface, leading to stronger interfacial interactions and the suppression of defects at the perovskite/HTM interface. As a result, perovskite solar cells (PSCs) employing FTPE‐ST achieve a champion power conversion efficiency (PCE) of 25.21% with excellent long‐time stability, one of the highest PCEs for non‐spiro HTMs in n‐i‐p PSCs. In addition, the excellent film‐forming capacity of the HTM enables the fabrication of FTPE‐ST‐based large‐scale PSCs (1.0 cm2) and modules (29.0 cm2), which achieve PCEs of 24.21% (certificated 24.17%) and 21.27%, respectively.
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Research context

OpenAlex topics: Perovskite Materials and Applications · Conducting polymers and applications · Chalcogenide Semiconductor Thin Films

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Beijing Key Laboratory of Novel Thin‐Film Solar Cells North China Electric Power University Beijing 102206 China

Institut des Sciences et Ingénierie Chimiques Ecole Polytechnique Fédérale de Lausanne (EPFL) Lausanne CH‐1015 Switzerland

Center of Artificial Photosynthesis for Solar Fuels and Department of Chemistry School of Science and Research Center for Industries of the Future Westlake University Hangzhou 310024 China

Division of Solar Energy Conversion and Catalysis at Westlake University Zhejiang Baima Lake Laboratory Co., Ltd. Hangzhou Zhejiang 310000 China

School of Engineering Westlake University Hangzhou 310024 China

Department of Chemistry Lomonosov Moscow State University Moscow 119991 Russia

Department of Physics Mendeleev University of Chemical Technology Moscow 125047 Russia

Computational Chemistry Laboratory Department of Organic and Biochemistry Faculty of Chemistry University of Tabriz Tabriz 5166616471 Iran

Chemistry Department Faculty of Science King Abdulaziz University P. O. Box 80203 Jeddah 21589 Saudi Arabia

Funding

National Key Research and Development Program of China · Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung · National Natural Science Foundation of China · Higher Education Discipline Innovation Project

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