Controlling the Polarity of Fullerene Derivatives to Optimize Nanomorphology in Blend Films
Controlling the Polarity of Fullerene Derivatives to Optimize Nanomorphology in Blend Films
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DOI：
10.1021/acsami.5b11180
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发表时间：
2016-02-24
影响因子：
9.5
通讯作者：
Ohno, Toshinobu
中科院分区：
文献类型：
--
作者：
Matsumoto, Fukashi;Iwai, Toshiyuki;Ohno, Toshinobu
开发一种设计策略以建立受体材料与供体材料的相容性对于有机太阳能电池的合理开发是重要的。我们合成了2，6-二甲氧基苯基亚甲基富勒烯衍生物，以实现增强的开路电压，我们研究了极性及其对活性层的膜形貌的影响。所合成的富勒烯衍生物的极性的影响显着的官能团的存在下，如甲氧基，醚，酯基团。聚（3-己基噻吩）（P3 HT）/富勒烯衍生物的共混物膜的宏观/纳米级的形态调查和光谱分析表明，材料之间的平衡极性的结果，在没有晶粒和鲁棒的相分离形成优化的纳米形态。由P3 HT和富勒烯衍生物组成的光伏电池的器件性能的测量证实了与形态分析中所示的趋势相同的趋势。这一发现使我们能够获得改善的功率转换效率，因为来自富勒烯衍生物的增强的开路电压。
Developing a design strategy to establish the compatibility of acceptor materials with donor materials is important for the rational development of organic solar cells. We synthesized 2,6-dimethoxyphenyl methanofullerene derivatives to realize an enhanced open-circuit voltage, and we investigated polarities and their effects on the film morphology of the active layer. The polarities of the synthesized fullerene derivatives were affected significantly by the presence of functional groups, such as methoxy, ether, and ester groups. Macro/nanoscopic morphological investigation and spectroscopic analysis of the blend films of the poly(3-hexylthiophene)(P3HT)/fullerene derivatives showed that a balanced polarity between materials results in the formation of optimized nanomorphology without grains and robust phase separation. Measurements of the device performance of the photovoltaic cells composed of P3HT and the fullerene derivatives confirmed the same tendency as that shown in the morphological analysis. This finding enables us to obtain an improved power conversion efficiency because of the enhanced open circuit voltage derived from the fullerene derivatives.