Abstract Two novel highly soluble bis(pyrrolidino)[60]fullerenes were synthesized and investigated as promising electron acceptor materials for organic solar cells. Reduced electron affinity of bis(pyrrolidino)[60]fullerenes as compared to the reference [60]PCBM enabled a spectacular increase in open-circuit voltage of organic bulk heterojunction solar cells by ~200 mV while using model P3HT and PCDTBT electron donor polymers. In addition to the improved optoelectronic properties, bis(pyrrolidino)[60]fullerenes were found to be resistant towards the photochemical cross-linking in contrast to conventional [60]PCBM and conjugated polymers. Most importantly, the designed fullerene derivatives efficiently suppressed photooxidation of conjugated polymers as revealed by ESR spectroscopy, which features a tremendous potential of applying these materials in the development of efficient and durable organic photovoltaics.

中文翻译：

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双（吡咯烷）[60] 富勒烯：有前途的基于富勒烯的光稳定受体抑制光诱导吸收剂降解途径

摘要 合成并研究了两种新型的高溶解性双(吡咯烷)[60]富勒烯作为有机太阳能电池的电子受体材料。与参考文献 [60]PCBM 相比，双（吡咯烷）[60] 富勒烯的电子亲和性降低，使有机本体异质结太阳能电池的开路电压显着增加约 200 mV，同时使用模型 P3HT 和 PCDTBT 电子供体聚合物。除了改进的光电性能外，与传统的 [60] PCBM 和共轭聚合物相比，双（吡咯烷基）[60] 富勒烯被发现对光化学交联具有抵抗力。最重要的是，ESR 光谱显示，设计的富勒烯衍生物有效抑制了共轭聚合物的光氧化，