期刊
POLYMER JOURNAL
卷 53, 期 9, 页码 975-987出版社
SPRINGERNATURE
DOI: 10.1038/s41428-021-00497-9
关键词
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资金
- ACT-C, JST, Japan [JPMJCR12YW]
- JSPS [26810129]
- MEXT, Japan [15H00751]
- Okayama Foundation for Science and Technology
- Yakumo Foundation for Environmental Science
- Tonen General Research/Development Encouragement & Scholarship Foundation
- Grants-in-Aid for Scientific Research [15H00751, 26810129] Funding Source: KAKEN
Choosing appropriate building blocks and developing new donor and acceptor units are crucial for high-performance D-A semiconducting polymers. Introducing pi-extended aromatic frameworks helps facilitate dense pi-pi stacking structures. Novel pi-extended heteropolycyclic aromatic frameworks have great potential as building units for high-performance organic electronic devices.
The choice of appropriate building blocks and the development of new donor and acceptor units are essential for the creation of high-performance donor-acceptor (D-A)-type semiconducting polymers. In addition, the introduction of pi-extended aromatic frameworks into polymer main chains is a useful strategy to facilitate dense pi-pi stacking structures with long-range order in the solid-state, thereby enabling efficient carrier transport in organic electronics. However, such highly pi-extended aromatic frameworks have rarely been reported due to the need for multiple steps. This focus review describes the synthesis and characterization of D-A polymers based on three pi-extended heteropolycyclic aromatic frameworks, using phenanthro[1,2-b:8,7-b']dithiophene (PDT) as a weak donor and alkoxy-substituted anthra[1,2-c:5,6-c']bis([1,2,5]thiadiazole) (ATz) and vinylene-bridged 5,6-difluorobenzo[c][1,2,5]thiadiazole (FBTzE) as new thiadiazole-based acceptor units. In addition, their applications to organic electronic devices, such as organic field-effect transistors (OFETs) and organic photovoltaic cells (OPVs), and the detailed relationship between the thin-film structure and device performance in OFETs and OPVs were investigated. These results indicate that these novel pi-extended heteropolycyclic aromatic frameworks may serve as building units for the development of wide-bandgap p-type semiconducting polymers for nonfullerene solar cells and low-bandgap n-type semiconducting polymers for OFETs and OPVs. Our recent studies on the development of semiconducting polymers based on three novel pi-extended heteropolycyclic aromatic frameworks, using phenanthro[1,2-b:8,7-b']dithiophene (PDT) as a weak donor and alkoxy-substituted anthra[1,2-c:5,6-c']bis([1,2,5]thiadiazole) (ATz) and vinylene-bridged 5,6-difluorobenzo[c][1,2,5]thiadiazole (FBTzE) as new thiadiazole-based acceptor units are described. Furthermore, their detailed relationships between the thin-film structure and device performance in organic field-effect transistors (OFETs) and organic photovoltaic cells (OPVs) were investigated. These results demonstrated that these novel pi-extended heteropolycyclic aromatic frameworks have great potential as building units for high-performance OFETs and OPVs.
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