9.0% power conversion efficiency from ternary all-polymer solar cells

Zhaojun Li, Xiaofeng Xu, Wei Zhang, Xiangyi Meng, Zewdneh Genene, Wei Ma, Wendimagegn Mammo, Arkady Yartsev, Mats R. Andersson, René A.J. Janssen, Ergang Wang

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    Abstract

    Integration of a third component into a single-junction polymer solar cell (PSC) is regarded as an attractive strategy to enhance the performance of PSCs. Although binary all-polymer solar cells (all-PSCs) have recently emerged with compelling power conversion efficiencies (PCEs), the PCEs of ternary all-PSCs still lag behind those of the state-of-the-art binary all-PSCs, and the advantages of ternary systems are not fully exploited. In this work, we realize high-performance ternary all-PSCs with record-breaking PCEs of 9% and high fill factors (FF) of over 0.7 for both conventional and inverted devices. The improved photovoltaic performance benefits from the synergistic effects of extended absorption, more efficient charge generation, optimal polymer orientations and suppressed recombination losses compared to the binary all-PSCs, as evidenced by a set of experimental techniques. The results provide new insights for developing high-performance ternary all-PSCs by choosing appropriate donor and acceptor polymers to overcome limitations in absorption, by affording good miscibility, and by benefiting from charge and energy transfer mechanisms for efficient charge generation.

    Original languageEnglish
    Pages (from-to)2212-2221
    Number of pages10
    JournalEnergy & Environmental Science
    Volume10
    Issue number10
    DOIs
    Publication statusPublished - 8 Sep 2017

    Bibliographical note

    'This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence.'

    Keywords

    • photovoltaic
    • soloar cells
    • device performance
    • polymers

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  • Cite this

    Li, Z., Xu, X., Zhang, W., Meng, X., Genene, Z., Ma, W., Mammo, W., Yartsev, A., Andersson, M. R., Janssen, R. A. J., & Wang, E. (2017). 9.0% power conversion efficiency from ternary all-polymer solar cells. Energy & Environmental Science, 10(10), 2212-2221. https://doi.org/10.1039/c7ee01858d