TY - JOUR
T1 - 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
AU - Liao, Qiaogan
AU - Yang, Kun
AU - Chen, Jianhua
AU - Koh, Chang Woo
AU - Tang, Yumin
AU - Su, Mengyao
AU - Wang, Yang
AU - Yang, Yinhua
AU - Feng, Xiyuan
AU - He, Zhubing
AU - Woo, Han Young
AU - Guo, Xugang
N1 - Funding Information:
J.C. thanks the National Natural Science Foundation of China (61804073), Basic Research Fund of Shenzhen City (JCYJ20170817104319061), and the China Postdoctoral Science Foundation (2018M631727). X.G. thanks the National Science Foundation of China (21774055), the Shenzhen Basic Research Fund (JCYJ20170817105905899), and the Shenzhen Key Lab funding (ZDSYS201505291525382). Y.W. acknowledges the financial support by the Natural National Science Foundation of China (No. 201805128). H.Y.W. is grateful to the financial support from the NRF of Korea (2016M1A2A2940911 and 2015M1A2A2057506).
Publisher Copyright:
Copyright © 2019 American Chemical Society.
PY - 2019/8/28
Y1 - 2019/8/28
N2 - 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 cm2 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.
AB - 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 cm2 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.
KW - backbone coplanarity
KW - noncovalent interaction
KW - nonfullerene organic solar cells
KW - nonhalogenated solvent
KW - organic field-effect transistors
UR - http://www.scopus.com/inward/record.url?scp=85071712477&partnerID=8YFLogxK
U2 - 10.1021/acsami.9b09692
DO - 10.1021/acsami.9b09692
M3 - Article
C2 - 31382736
AN - SCOPUS:85071712477
VL - 11
SP - 31119
EP - 31128
JO - ACS applied materials & interfaces
JF - ACS applied materials & interfaces
SN - 1944-8244
IS - 34
ER -