PEDOT:PSS‐Assisted Exfoliation and Functionalization of 2D Nanosheets for High‐Performance Organic Solar Cells |
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| Authors: | Wang Xing Yusheng Chen Xiaoxi Wu Xiaozhou Xu Pan Ye Ting Zhu Qingyu Guo Liqiu Yang Weiwei Li Hui Huang |
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| Affiliation: | 1. College of Materials Science and Opto‐electronic Technology, University of Chinese Academy of Sciences, Beijing, China;2. CAS Key Laboratory of Organic Solids, Institute of Chemistry Chinese Academy of Sciences, Beijing, China |
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| Abstract: | Here, a facial and scalable method for efficient exfoliation of bulk transition metal dichalcogenides (TMD) and graphite in aqueous solution with poly(3,4‐ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) to prepare single‐ and few‐layer nanosheets is demonstrated. Importantly, these TMD nanosheets retain the single crystalline characteristic, which is essential for application in organic solar cells (OSCs). The hybrid PEDOT:PSS/WS2 ink prepared by a simple centrifugation is directly integrated as a hole extraction layer for high‐performance OSCs. Compared with PEDOT:PSS, the PEDOT:PSS/WS2‐based devices provide a remarkable power conversion efficiency due to the “island” morphology and benzoid–quinoid transition. This study not only demonstrates a novel method for preparing single‐ and few‐layer TMD and graphene nanosheets but also paves a way for their applications without further complicated processing. |
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| Keywords: | 2D nanosheets hole extraction layers organic solar cells PEDOT:PSS (poly(3,4‐ethylenedioxythiophene):poly(styrenesulfonate)) |
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