Fluorine substitution influence on benzo[2,1,3]thiodiazole based polymers for field-effect transistor applications
AssigneeThe Regents of the University of California
InventorsMing Wang, Guillermo C. Bazan
Life of this patent
Estimating the term…
Abstract
Four conjugated copolymers with a donor/acceptor architecture comprising 4,4-dihexadecyl-4H-cyclopenta[1,2-b:5,4-b′]dithiophene as the donor structural unit and benzo[2,1,3]thiodiazole fragments with varying degrees of fluorination have been synthesized and characterized. It has been shown that the HOMO levels were decreased after the fluorine substitution. The field-effect charge carrier mobility was similar for all polymers with less than an order of magnitude difference between different acceptor units.
Claims26
A composition of matter, comprising:
- a semiconducting polymer having a main chain section and a repeating unit of the structure:
- wherein each Ar is independently a substituted or non-substituted aromatic functional group, or each Ar is independently nothing and the valence of its respective ring is completed with hydrogen,
- each R is independently hydrogen or a substituted or non-substituted alkyl, aryl or alkoxy chain;
- and
- X is C, Si, Ge, N or P.
A method of preparing a donor-acceptor copolymer, comprising:
- preparing a monomer, wherein the monomer comprises a donor structure having an electron rich moiety in combination with an acceptor structure including fluorine and having electron deficient moiety;
- reacting the monomer to produce a donor-acceptor copolymer that comprises a regioregular conjugated main chain section, and performing an end-capping reaction on the donor-acceptor copolymer;
- wherein:
- the charge carrier mobility of the regioregular donor-acceptor copolymer is greater than the charge carrier mobility of a regiorandom donor-acceptor copolymer of similar composition.
Dependencies are inferred from the claim text.