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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, QiaoganYang, KunChen, JianhuaKoh, Chang WooTang, YuminSu, MengyaoWang, YangYang, YinhuaFeng, XiyuanHe, ZhubingWoo, Han YoungGuo, 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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