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http://hdl.handle.net/10397/106885
Title: | Enhancing open-circuit voltage of high-efficiency nonfullerene ternary solar cells with a star-shaped acceptor | Authors: | Cai, G Li, Y Zhou, J Xue, P Liu, K Wang, J Xie, Z Li, G Zhan, X Lu, X |
Issue Date: | 11-Nov-2020 | Source: | ACS applied materials and interfaces, 11 Nov. 2020, v. 12, no. 45, p. 50660-50667 | Abstract: | The ternary strategy has been widely used in high-efficiency organic solar cells (OSCs). Herein, we successfully incorporated a mid-band-gap star-shaped acceptor, FBTIC, as the third component into the PM6/Y6 binary blend film, which not only achieved a panchromatic absorption but also significantly improved the open-circuit voltage (VOC) of the devices due to the high-lying lowest unoccupied molecular orbital (LUMO) of the FBTIC. Morphology characterizations show that star-shaped FBTIC molecules are amorphously distributed in the ternary system, and the finely tuned ternary film morphology facilitates the exciton dissociation and charge collection in ternary devices. As a result, the best PM6/Y6/FBTIC-based ternary OSCs achieved a power conversion efficiency (PCE) of 16.7% at a weight ratio of 1.0:1.0:0.2. | Keywords: | Fused-ring electron acceptor Nonfullerene acceptor Organic solar cell Star-shaped acceptor Ternary |
Publisher: | American Chemical Society | Journal: | ACS applied materials and interfaces | ISSN: | 1944-8244 | EISSN: | 1944-8252 | DOI: | 10.1021/acsami.0c14612 | Rights: | © 2020 American Chemical Society This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Materials & Interfaces, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acsami.0c14612. |
Appears in Collections: | Journal/Magazine Article |
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Liu_Enhancing_Open-Circuit_Voltage.pdf | Pre-Published version | 1.81 MB | Adobe PDF | View/Open |
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