期刊
CHEMICAL SCIENCE
卷 9, 期 15, 页码 3638-3643出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7sc05093c
关键词
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资金
- Ministry of Education, Culture, Sports, Science and Technology, Japan [26102008]
- Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency (JST)
- Chiba University SEEDS Fund (Chiba University Open Recruitment for International Exchange Program)
- Grants-in-Aid for Scientific Research [26102008, 15K21721] Funding Source: KAKEN
Helical self-assembly of functional pi-conjugated molecules offers unique photochemical and electronic properties in the spectroscopic level, but there are only a few examples that demonstrate their positive impact on the optoelectronic device level. Here, we demonstrate that hydrogen-bonded tapelike supramolecular polymers of a barbiturated oligo(alkylthiophene) show notable improvement in their photovoltaic properties upon organizing into helical nanofibers. A tapelike hydrogen-bonded supramolecular array of barbiturated oligo(butylthiophene) molecules was directly visualized by STM at a liquid-solid interface. TEM, AFM and XRD revealed that the tapelike supramolecular polymers further organize into helical nanofibers in solution and bulk states. Bulk heterojunction solar cells of the helical nanofibers and soluble fullerene showed a power conversion efficiency of 4.5%, which is markedly high compared to that of the regioisomer of butyl chains organizing into 3D lamellar agglomerates.
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