title: High-Performance Organic Field-Effect Transistors Fabricated Based on a Novel Ternary π-Conjugated Copolymer.
abstract: In this study, we developed a ternary conjugated polymer, IFBT-TT, consisting of centrosymmetric indaceno[1,2-b:5,6-b']dithiophene and thieno[3,2-b]thiophene as the electron-donating units and an asymmetric 5-fluorobenzo[c][1,2,5]thiadiazole as the electron-accepting unit. The target copolymer was synthesized using an acceptor-donor-acceptor (A-D-A) type of macromonomer, which gave the target copolymer a precisely defined D1-A-D2-A architecture. Theoretical simulation revealed that the IFBT-TT features C-H···N and F···S nonbonding interactions, leading to a highly rigid and planar molecular backbone. Although the spin-cast IFBT-TT films exhibited an amorphous morphology lacking in ordered structures, the fabricated field-effect transistors presented remarkable p-type transport properties with high mobility of up to 5.0 cm2V-1s-1and excellent ambient stability. These observations highlight that the integration of a three-component D1-A-D2-A-type backbone framework is an effective molecular design strategy for high-mobility conjugated polymers.
authors.affiliation: Institute of Polymer Optoelectronic Materials and Devices, and State Key Laboratory of Luminescent Materials and Devices, South China University of Technology , Guangzhou 510640, P. R. China.
authors.forename: Wenkai
authors.initials: W
authors.lastname: Zhong
authors.affiliation: Institute of Polymer Optoelectronic Materials and Devices, and State Key Laboratory of Luminescent Materials and Devices, South China University of Technology , Guangzhou 510640, P. R. China.
authors.forename: Sheng
authors.initials: S
authors.lastname: Sun
authors.affiliation: Institute of Polymer Optoelectronic Materials and Devices, and State Key Laboratory of Luminescent Materials and Devices, South China University of Technology , Guangzhou 510640, P. R. China.
authors.forename: Lei
authors.identifier: http://orcid.org/0000-0003-1137-2355
authors.initials: L
authors.lastname: Ying
authors.affiliation: Department of Physics and Astronomy, Shanghai Jiao Tong University , Shanghai 200240, P. R. China.
authors.forename: Feng
authors.initials: F
authors.lastname: Liu
authors.affiliation: Institute of Polymer Optoelectronic Materials and Devices, and State Key Laboratory of Luminescent Materials and Devices, South China University of Technology , Guangzhou 510640, P. R. China.
authors.forename: Linfeng
authors.initials: L
authors.lastname: Lan
authors.affiliation: Institute of Polymer Optoelectronic Materials and Devices, and State Key Laboratory of Luminescent Materials and Devices, South China University of Technology , Guangzhou 510640, P. R. China.
authors.forename: Fei
authors.identifier: http://orcid.org/0000-0001-9665-6642
authors.initials: F
authors.lastname: Huang
authors.affiliation: Institute of Polymer Optoelectronic Materials and Devices, and State Key Laboratory of Luminescent Materials and Devices, South China University of Technology , Guangzhou 510640, P. R. China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Cao
keywords: donor−acceptor-type polymers; high mobility; organic field-effect transistors; regioregular polymers; ternary conjugated polymers