Co-La-Based Hole-Transporting Layers for Binary Organic Solar Cells with 18.82 % Efficiency

Guangcong Zhang; Qiaomei Chen; Zhou Zhang; Jie Fang; Chaowei Zhao; Yen Wei; Weiwei Li

doi:10.1002/anie.202216304

Co-La-Based Hole-Transporting Layers for Binary Organic Solar Cells with 18.82 % Efficiency

Angew Chem Int Ed Engl. 2023 Jan 23;62(4):e202216304. doi: 10.1002/anie.202216304. Epub 2022 Dec 16.

Authors

Guangcong Zhang¹, Qiaomei Chen¹, Zhou Zhang¹, Jie Fang², Chaowei Zhao², Yen Wei³, Weiwei Li¹

Affiliations

¹ Beijing Advanced Innovation Center for Soft Matter Science and Engineering & State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, 100029, P. R. China.
² Institute of Applied Chemistry, Jiangxi Academy of Sciences, Nanchang, 330096, P. R. China.
³ MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Department of Chemistry, Tsinghua University, Beijing, 100084, China.

PMID: 36448962
DOI: 10.1002/anie.202216304

Abstract

Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) is a widely used hole transporting layer (HTL) in organic solar cells (OSCs), but its acidity severely reduces the stability of devices. Until now, very few HTLs were developed to replace PEDOT:PSS toward stable and high-performance OSCs. Herein, a new cobalt-lanthanum (Co-La) inorganic system was reported as HTL to show a high conversion efficiency (PCE) of 18.82 %, which is among the top PCEs in binary OSCs. Since electron-rich outer shell of La atom can interact with Co atom to form charge transfer complex, the work function and conductivity of the Co-La system could be simultaneously enhanced compared to Co or La-based HTLs. This Co-La system could also be applied into other OSCs to show high performance. All these results demonstrate that binary Co-La systems as HTL can efficiently tackle the issue in hole transporting and show powerful application in OSCs to replace PEDOT:PSS.

Keywords: Hole Transporting Layers; Organic; PEDOT:PSS; Solar Cells; Stability.

Abstract

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