Abstract Formulation engineering, featuring with different ingredients combined, is a useful strategy for making efficient electronic acceptors because it can achieve effects that cannot be obtained from its components when these are used singly. Herein, we show a contour plot with different formulations of isomeric phenyl-C71-butyric acid methyl ester (PC71BM) as electron acceptors in poly(3-hexylthiophene) (P3HT):PC71BM polymer solar cells (PSCs). Upon altering fullerene formulation the PCEs change in the range of 0.87–4.01%. The optimized formulation consisting of ~ 80% α-PC71BM, ~ 10% β1-PC71BM, and ~ 10% β2-PC71BM exhibits the best PCE of 4.01%, which mainly benefits from the optimum morphology of P3HT-fullerene heterojunction film. The present work demonstrates a successful strategy by controlling morphology of PC71BM isomers to improve the PCE of P3HT-based PSCs, and consolidates the photovoltaic performance of polymer solar cells heavily dependent on the formulation of fullerene-based electron acceptors.

中文翻译：

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基于 P3HT 的聚合物太阳能电池中 PC 71 BM 异构体的配方

摘要 以不同成分组合为特征的配方工程是制造高效电子受体的有用策略，因为它可以实现单独使用时无法从其成分中获得的效果。在此，我们展示了不同配方的异构苯基-C71-丁酸甲酯（PC71BM）作为聚（3-己基噻吩）（P3HT）：PC71BM 聚合物太阳能电池（PSC）中的电子受体的等高线图。改变富勒烯配方后，PCE 的变化范围为 0.87-4.01%。由~80% α-PC71BM、~10% β1-PC71BM 和~10% β2-PC71BM 组成的优化配方表现出 4.01% 的最佳 PCE，这主要得益于 P3HT-富勒烯异质结膜的最佳形态。