Organic Solar Cells with Controlled Nanostructures Based on Microphase Separation of Fullerene-Attached Thiophene-Selenophene Heteroblock Copolymers
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- 作者：Peihong Chen ; Kyohei Nakano ; Kaori Suzuki ; Kazuhito Hashimoto ; Tomoka Kikitsu ; Daisuke Hashizume ; Tomoyuki Koganezawa ; Keisuke Tajima
- 刊名：ACS Applied Materials & Interfaces
- 出版年：2017
- 出版时间：February 8, 2017
- 年：2017
- 卷：9
- 期：5
- 页码：4758-4768
- 全文大小：708K
- ISSN：1944-8252
文摘
Heteroblock copolymers consisting of poly(3-hexylthiophene) and fullerene-attached poly(3-alkylselenophene) (T-b-Se-PCBP) were synthesized for organic photovoltaic applications by quasi-living catalyst transfer polycondensation and subsequent conversion reactions. Characterization of the polymers confirmed the formation of well-defined diblock structures with high loading of the fullerene at the side chain (∼40 wt %). Heteroblock copolymer cast as a thin film showed a clear microphase-separated nanostructure approximately 30 nm in repeating unit after thermal annealing, which is identical to the microphase-separated nanostructure of diblock copolymer consisting of poly(3-hexylthiophene) and fullerene-attached poly(3-alkylthiophene) (T-b-T-PCBP). These heteroblock copolymers provide an ideal platform for investigating the effects of nanostructures and interfacial energetics on the performance of organic photovoltaic devices.