In this study, an efficient ternary bulk-heterojunction (BHJ) organic solar cell (OSC) is demonstrated by incorporating two acceptors, PC61BM and ITC6-4F, with a polymer donor (PM6). This reveals that the addition of PC61BM not only enhances the electron mobility of the derived BHJ blend but also facilitates exciton dissociation, resulting in a more balanced charge transport alongside with reduced trap-assisted charge recombination. Consequently, as compared to the pristine PM6/ITC6-4F device, the optimal ternary OSC is revealed to deliver an improved power conversion efficiency (PCE) of 15.11% with a boosted JSC, VOC, and fill factor (FF) simultaneously. The resultant VOC and FF are among the highest values recorded in the literature for the ternary OSCs with a PCE exceeding 15%. This result thus suggests that besides improving the charge transport characteristics in devices, incorporating a fullerene derivative as part of the acceptor can also improve the resultant VOC, which can reduce the energy loss to realize efficient organic photovoltaics.

中文翻译：

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通过增强电荷传输和减少能量损耗，使三元有机太阳能电池的效率提高15％以上。

在这项研究中，通过将两个受体PC61BM和ITC6-4F与一个聚合物供体（PM6）结合在一起，证明了一种有效的三元本体-异质结（BHJ）有机太阳能电池（OSC）。这表明添加PC61BM不仅增强了衍生的BHJ共混物的电子迁移率，而且还促进了激子离解，从而导致了更加平衡的电荷传输，同时减少了陷阱辅助的电荷重组。因此，与原始PM6 / ITC6-4F器件相比，最佳三元OSC可以提供15.11％的改进的功率转换效率（PCE），同时具有增强的JSC，VOC和填充因子（FF）。对于PCE超过15％的三元OSC，所得的VOC和FF在文献中记录的最高值中。