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- W2998522203 abstract "Solution-processed nonfullerene bulk-heterojunction (BHJ) polymer solar cells (PSCs), which are composed of polymer donors and organic acceptors, are proven to manifest promising performance and long-term stability. In this concise contribution, bithieno[3,4-c]pyrrole-4,6-dione (BiTPD), which is a TPD derivative but presents a large planar structure and strong electron-withdrawing ability, was used to construct a large-bandgap polymer donor PBiTPD. Results show that the polymer donor PBiTPD realized power conversion efficiency (PCE) as high as 14.2% in fullerene-free BHJ solar cells. Larger ionization potential value, more favorable face-on backbone orientation, and stronger crystallinity were concurrently obtained in PBiTPD. Correspondingly, improved and more balanced charge transportation; less nongeminate and trap-assisted recombination losses; and thus high fill factor (FF) of 67%, short-circuit current density (JSC) of 25.6 mA·cm–2, and high open-circuit voltage (VOC) of 0.83 V were concurrently achieved in PBiTPD-based devices. PBiTPD does clear the way for a novel and promising class of large-bandgap polymer donor candidates." @default.
- W2998522203 created "2020-01-10" @default.
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- W2998522203 date "2020-01-02" @default.
- W2998522203 modified "2023-10-16" @default.
- W2998522203 title "Bithieno[3,4-<i>c</i>]pyrrole-4,6-dione-Mediated Crystallinity in Large-Bandgap Polymer Donors Directs Charge Transportation and Recombination in Efficient Nonfullerene Polymer Solar Cells" @default.
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- W2998522203 doi "https://doi.org/10.1021/acsenergylett.9b02842" @default.
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