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7 October 2014 Investigation of charge injection characteristics in diketopyrrolopyrrole ambipolar semiconducting polymers
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A semiconducting polymers with conjugated diketopyrrolopyrrole (DPP) unit was developed for high performance ambipolar organic field-effect transistors (OFETs). We report electrical characteristics of DPP OFETs in various ways which measured transistor and inverter performance with various bias conditions and self-assembled monolayers (SAMs) treatment. Ambipolar DPP conjugated polymer OFETs showed high hole and electron mobility of μh=0.57 cm2V-1s-1 and μe=0.51 cm2V-1s-1 with O2 plasma treatment and 1-decanethiol SAMs treatment, respectively with annealing at 100°C. Contact resistance effect on mobilities was investigated by measuring contact resistance during device operation through gated four-point probe (gFPP) and simultaneous contact resistance extraction model directly from current voltage characteristics.
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Seon Jeng Lee, Seok Heon Jung, Jin-Kyun Lee, Cheawon Kim, and Mi Jung Lee "Investigation of charge injection characteristics in diketopyrrolopyrrole ambipolar semiconducting polymers", Proc. SPIE 9185, Organic Field-Effect Transistors XIII; and Organic Semiconductors in Sensors and Bioelectronics VII, 918512 (7 October 2014);

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