Cold Isostatic‐Pressured Silver Nanowire Electrodes for Flexible Organic Solar Cells via Room‐Temperature Processes |
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| Authors: | Ji Hoon Seo Inchan Hwang Han‐Don Um Sojeong Lee Kangmin Lee Jeonghwan Park Hyeonoh Shin Tae‐Hyuk Kwon Seok Ju Kang Kwanyong Seo |
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| Affiliation: | 1. Department of Energy Engineering, Ulsan National Institute of Science and Technology, Ulsan, South Korea;2. Max Planck Center for Attosecond Science, Max Planck POSTECH/KOREA Research Initiative, Pohang, Gyeongbuk, South Korea;3. Department of Chemistry, Ulsan National Institute of Science and Technology, Ulsan, South Korea |
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| Abstract: | Transparent conducting electrodes (TCEs) are considered to be an essential structural component of flexible organic solar cells (FOSCs). Silver nanowire (AgNW) electrodes are widely used as TCEs owing to their excellent electrical and optical properties. The fabrication of AgNW electrodes has faced challenges in terms of forming large uniform interconnected networks so that high conductivity and reproducibility can be achieved. In this study, a simple method for creating an intimate contact between AgNWs that uses cold isostatic pressing (CIP) is demonstrated. This method increases the conductivity of the AgNW electrodes, which enables the fabrication of high‐efficiency inverted FOSCs that have a power conversion efficiency of 8.75% on flexible polyethylene terephthalate with no short circuiting occurring as the CIP process minimizes the surface roughness of the AgNW electrode. This allows to achieve 100% manufacturing yield of FOSCs. Furthermore, these highly efficient FOSCs are proven to only be 2.4% less efficient even for an extreme bending radius of R ≈ 1.5 mm, compared with initial efficiency. |
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| Keywords: | cold isostatic‐pressing flexible organic solar cells room‐temperature processes silver nanowires transparent electrodes |
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