An alcohol-dispersed conducting polymer complex for fully printable organic solar cells with improved stability

Youyu Jiang, Xinyun Dong, Lulu Sun, Tiefeng Liu, Fei Qin, Cong Xie, Pei Jiang, Lu Hu, Xin Lu, Xianmin Zhou, Wei Meng, Ning Li, Christoph J. Brabec and Yinhua Zhou ()
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Youyu Jiang: Huazhong University of Science and Technology
Xinyun Dong: Huazhong University of Science and Technology
Lulu Sun: Huazhong University of Science and Technology
Tiefeng Liu: Huazhong University of Science and Technology
Fei Qin: Huazhong University of Science and Technology
Cong Xie: Huazhong University of Science and Technology
Pei Jiang: Huazhong University of Science and Technology
Lu Hu: Huazhong University of Science and Technology
Xin Lu: Huazhong University of Science and Technology
Xianmin Zhou: Huazhong University of Science and Technology
Wei Meng: Friedrich-Alexander-Universität Erlangen-Nürnberg
Ning Li: Friedrich-Alexander-Universität Erlangen-Nürnberg
Christoph J. Brabec: Friedrich-Alexander-Universität Erlangen-Nürnberg
Yinhua Zhou: Huazhong University of Science and Technology

Nature Energy, 2022, vol. 7, issue 4, 352-359

Abstract: Abstract Efficient and stable organic solar cells via full coating are highly desirable. Poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) is a classic conducting polymer complex and widely used for hole collection in fully printable devices. However, PEDOT:PSS is typically dispersed in water and exhibits strong acidity that deteriorates device efficiency and stability. Here we report an alcohol-dispersed formulation (denoted as PEDOT:F) by adopting perfluorinated sulfonic acid ionomers as counterions. The ionomers have a special advantage of having two solubility parameters and can be dispersed in water or alcohols, which enables us to prepare PEDOT:F formulations dispersed in alcohols. The alcohol-dispersed formulation has good wetting properties and low acidity, which avoids the drawbacks of aqueous PEDOT:PSS. Fully printable organic photovoltaics (from bottom electrode to top electrode) based on PEDOT:F were obtained with a power conversion efficiency of 15% and could retain 83% of the initial efficiency under continuous illumination at maximum power point tracking for 1,330 h.

Date: 2022
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DOI: 10.1038/s41560-022-00997-9

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