452726 Approaches to Solution Processable n-Channel π-Conjugated Donor-Acceptor Co-Polymers and Device Applications

Wednesday, November 16, 2016: 1:45 PM
Golden Gate 2 (Hilton San Francisco Union Square)
Zhibo Yuan, School of Chemistry and Biochemistry, Boyi Fu, School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, GA and Elsa Reichmanis, Chemistry & Biochemistry, Georgia Institute of Technology, Atlanta, GA

2,2’-bithiazole was synthesized in one step and copolymerized with dithienyldiketopyrrolopyrrole to afford poly(dithienyldiketopyrrolopyrrole-bithiazole), PDBTz. PDBTz exhibited electron mobility reaching 0.3 cm2V-1s-1 in organic field-effect transistor (OFET) configuration; this contrasts with a recently discussed isoelectronic conjugated polymer comprising an electron rich bithiophene and dithienyldiketopyrrolopyrrole, which displays merely hole transport characteristics. This inversion of charge carrier transport characteristics confirms the significant potential for bithiazole in the development of electron transport semiconducting materials. Branched 5-decylheptacyl side chains were incorporated into PDBTz to enhance polymer solubility, particularly in non-halogenated, more environmentally compatible solvents. PDBTz cast from a range of non-halogenated solvents exhibited film morphologies and field-effect electron mobility similar to those cast from halogenated solvents.

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See more of this Session: Conjugated Polymers
See more of this Group/Topical: Materials Engineering and Sciences Division