Add time:08/28/2019         Source:sciencedirect.com

A novel Thiophene (cas 110-02-1) branched polystyrene copolymer (PS-Th) was successfully synthesized and well characterized. Two different Organic Field Effect Transistor (OFET) devices were fabricated by using this novel PS-Th material and polystyrene (PS) as insulator materials and main performance parameters of the devices such as mobility (μFET), on/off ratio (Ion/off), and threshold voltage (VTh) were compared. Consequently, our results indicated that PS-Th copolymer was efficiently working as dielectric material for OFETs. Moreover, μFET significantly enhanced (approx. 3.7 times) compared to the PS based OFET device while VTh and Ion/off were slightly increasing. This situation can be explained by well organized molecular arrangement at the dielectric-semiconductor interface via thiophene-thiophene interaction between semiconductor material Poly(3-hexylthiophene-2,5-diyl) (P3HT) and insulator material PS-Th chains.

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