Significant Enhancement of Hole Transport Ability in Conjugated Polymer/Fullerene Bulk Heterojunction Microspheres
Significant Enhancement of Hole Transport Ability in Conjugated Polymer/Fullerene Bulk Heterojunction Microspheres
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DOI：
10.1021/acsapm.8b00170
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发表时间：
2019-01
影响因子：
5
通讯作者：
Amandeep Jindal;Hiroaki Kotani;S. Kushida;A. Saeki;Takahiko Kojima;Yohei Yamamoto
中科院分区：
文献类型：
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作者：
Amandeep Jindal;Hiroaki Kotani;S. Kushida;A. Saeki;Takahiko Kojima;Yohei Yamamoto
体异质结（BHJ）策略要求通过双连续电荷传输层形成具有高载流子迁移率的广域供体-受体界面。在这里，我们报道了由区域随机聚己基噻吩(rla - pht)/苯基c61 -丁酸甲酯（PCBM）混合物通过蒸汽扩散法形成定义良好的BHJ微球。通过电化学氧化，与没有微球形态的rra-PHT/PCBM混合物形成的溶液铸造膜相比，BHJ微球由于增加了空穴传输特性而增强了PHT阳离子的生成。微球的光电导率和电化学稳定性与区域规则P3HT不规则聚集体的铸膜相当甚至更高。
Bulk heterojunction (BHJ) strategy requires morphology of wide area donor–acceptor interfaces with high charge carrier mobilities through the bicontinuous charge transporting layers. Here, we report formation of well-defined BHJ microspheres from regiorandom poly(hexylthiophene) (rra-PHT)/phenyl-C61-butyric acid methyl ester (PCBM) mixture by a vapor diffusion method. Through electrochemical oxidation, the BHJ microsphere exhibits enhanced generation of PHT cation species due to increased hole-transport property in comparison with a solution-cast film derived from rra-PHT/PCBM mixture without microsphere morphology. Photoconductivity and electrochemical stability of the microsphere are comparable or even higher than those of a cast film of irregular aggregates of regioregular P3HT.