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AuthorBarłóg, Maciej
AuthorZhang, Xianhe
AuthorKulai, Ihor
AuthorYang, Da Seul
AuthorSredojevic, Dusan N.
AuthorSil, Aritra
AuthorJi, Xiaozhou
AuthorSalih, Kifah S.M.
AuthorBazzi, Hassan S.
AuthorBronstein, Hugo
AuthorFang, Lei
AuthorKim, Jinsang
AuthorMarks, Tobin J.
AuthorGuo, Xugang
AuthorAl-Hashimi, Mohammed
Available date2022-01-25T08:35:23Z
Publication Date2019-11-26
Publication NameChemistry of Materials
Identifierhttp://dx.doi.org/10.1021/acs.chemmater.9b03525
CitationIndacenodithiazole-Ladder-Type Bridged Di(thiophene)-Difluoro-Benzothiadiazole-Conjugated Copolymers as Ambipolar Organic Field-Effect Transistors Maciej Barłóg, Xianhe Zhang, Ihor Kulai, Da Seul Yang, Dusan N. Sredojevic, Aritra Sil, Xiaozhou Ji, Kifah S. M. Salih, Hassan S. Bazzi, Hugo Bronstein, Lei Fang, Jinsang Kim, Tobin J. Marks, Xugang Guo, and Mohammed Al-Hashimi Chemistry of Materials 2019 31 (22), 9488-9496 DOI: 10.1021/acs.chemmater.9b03525
ISSN08974756
URIhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85075159317&origin=inward
URIhttp://hdl.handle.net/10576/25928
AbstractA series of four donor-acceptor conjugated copolymers P1-P4 with linear and branched side chains based on a ladder-type indacenodithiazole (IDTz) moiety containing an electron-deficient thiazole unit are copolymerized with di-2-thienyl-2,1,3-benzothiadiazole (DTBT) and 4,7-di(thien-2-yl)-5,6-difluoro-2,1,3-benzothiadiazole (DTBTff) as building blocks. Their optical, electrochemical, and thermal properties and charge transport behavior in organic field-effect transistors (OFETs) are studied. All copolymers exhibit nearly identical features in solution with good solubility. In the solid state, P1 does not exhibit a significant shift, while P3 shows a 27 nm red shift, thus illustrating the influence of the side chain. In the case of copolymers P1 and P2 having linear side chains, there is a clear effect of fluorination on the film morphology, while it is less pronounced in the case of polymers P3 and P4 having branched side chains. All copolymers P1-P4 have similar highest occupied molecular orbitals regardless of fluorination, while fluorinated polymers P2 and P4 result in an increase in the lowest unoccupied molecular orbital. In addition, density functional theory calculations reveal that the energy levels of IDTz are down-shifted in comparison to its IDT counterpart containing an electron-rich thiophene unit. OFETs based on all copolymers exhibit ambipolar behavior; among the four copolymers, P2 having a linear dodecyl side chain exhibits remarkable transport properties with saturated hole mobility as high as 0.87 cm2 V-1 s-1, while P3 exhibits the highest electron mobility of up to 0.50 cm2 V-1 s-1. Our results set an interesting path to further utilize the electron-deficient thiazole block in semiconducting materials.
Languageen
PublisherACS Publications
SubjectIndacenodithiazole; Benzothiadiazole; Organic Field-Effect Transistors
TitleIndacenodithiazole-Ladder-Type Bridged Di(thiophene)-Difluoro-Benzothiadiazole-Conjugated Copolymers as Ambipolar Organic Field-Effect Transistors
TypeArticle
Issue Number22
Volume Number31
dc.accessType Abstract Only


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