Backbone Coplanarity Tuning of 1,4-Di(3-alkoxy-2-thienyl)-2,5-difluorophenylene-Based Wide Bandgap Polymers for Efficient Organic Solar Cells Processed from Nonhalogenated Solvent
- Authors
- Liao, Qiaogan; Yang, Kun; Chen, Jianhua; Koh, Chang Woo; Tang, Yumin; Su, Mengyao; Wang, Yang; Yang, Yinhua; Feng, Xiyuan; He, Zhubing; Woo, Han Young; Guo, Xugang
- Issue Date
- 28-8월-2019
- Publisher
- AMER CHEMICAL SOC
- Keywords
- backbone coplanarity; nonhalogenated solvent; noncovalent interaction; nonfullerene organic solar cells; organic field-effect transistors
- Citation
- ACS APPLIED MATERIALS & INTERFACES, v.11, no.34, pp.31119 - 31128
- Indexed
- SCIE
SCOPUS
- Journal Title
- ACS APPLIED MATERIALS & INTERFACES
- Volume
- 11
- Number
- 34
- Start Page
- 31119
- End Page
- 31128
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/63466
- DOI
- 10.1021/acsami.9b09692
- ISSN
- 1944-8244
- Abstract
- Halogenated solvents are prevailingly used in the fabrication of nonfullerene organic solar cells (NF-OSCs) at the current stage, imposing significant restraints on their practical applications. By copolymerizing phthalimide or thieno[3,4-c]pyrrole-4,6-dione (TPD) with 1,4-di(3-alkoxy-2-thienyl)-2,5-difluorophenylene (DOTFP), which features intramolecular noncovalent interactions, the backbone planarity of the resulting DOTFP-based polymers can be effectively tuned, yielding distinct solubilities, aggregation characters, and chain packing properties. Polymer DOTFP-PhI with a more twisted backbone showed a lower degree of aggregation in solution but an increased film crystallinity than polymer DOTFP-TPD. An organic thin-film transistor and NF-OSC based on DOTFP-PhI, processed with a nonhalogenated solvent, exhibited a high hole mobility up to 1.20 cm(2) V-1 s(-1) and a promising power conversion efficiency up to 10.65%, respectively. The results demonstrate that DOTFP is a promising building block for constructing wide bandgap polymers and backbone coplanarity tuning is an effective strategy to develop high-performance organic semiconductors processable with a nonhalogenated solvent.
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