Over 14% Efficiency Folding-Flexible ITO-free Organic Solar Cells Enabled by Eco-friendly Acid-Processed Electrodes

Environment-friendly manufacturing and mechanical robustness are imperative for commercialization of flexible OSCs as green-energy source, especially in portable and wearable self-powered flexible electronics. Although, the commonly adopted PEDOT:PSS electrodes that are treated with severely corrosi...

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Published iniScience Vol. 23; no. 4; p. 100981
Main Authors Song, Wei, Peng, Ruixiang, Huang, Like, Liu, Chang, Fanady, Billy, Lei, Tao, Hong, Ling, Ge, Jinfeng, Facchetti, Antonio, Ge, Ziyi
Format Journal Article
LanguageEnglish
Published United States Elsevier Inc 24.04.2020
Elsevier
Subjects
Energy Storage
Materials Mechanics
Mechanical Property
Mechanical Property
Energy Storage
Materials Mechanics
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Summary:Environment-friendly manufacturing and mechanical robustness are imperative for commercialization of flexible OSCs as green-energy source, especially in portable and wearable self-powered flexible electronics. Although, the commonly adopted PEDOT:PSS electrodes that are treated with severely corrosive and harmful acid lack foldability. Herein, efficient folding-flexible OSCs with highly conductive and foldable PEDOT:PSS electrodes processed with eco-friendly cost-effective acid and polyhydroxy compound are demonstrated. The acid treatment endows PEDOT:PSS electrodes with high conductivity. Meanwhile, polyhydroxy compound doping contributes to excellent bending flexibility and foldability due to the better film adhesion between PEDOT:PSS and PET substrate. Accordingly, folding-flexible OSCs with high efficiency of 14.17% were achieved. After 1,000 bending or folding cycles, the device retained over 90% or 80% of its initial efficiency, respectively. These results represent one of the best performances for ITO-free flexible OSC reported so far and demonstrate a novel approach toward commercialized efficient and foldable green-processed OSCs. [Display omitted] •Highly conductive PEDOT:PSS electrodes based on eco-friendly acid were exploited•14.17% folding-flexible organic solar cells were realized•The bending performance was significantly improved by interface bonding engineering Energy Storage; Mechanical Property; Materials Mechanics
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ISSN:2589-0042
2589-0042
DOI:10.1016/j.isci.2020.100981