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.

Date Published: 7 October 2014
PDF: 8 pages
Proc. SPIE 9185, Organic Field-Effect Transistors XIII; and Organic Semiconductors in Sensors and Bioelectronics VII, 918512 (7 October 2014); doi: 10.1117/12.2061658

Published in SPIE Proceedings Vol. 9185:
Organic Field-Effect Transistors XIII; and Organic Semiconductors in Sensors and Bioelectronics VII
Zhenan Bao; Ruth Shinar; Ioannis Kymissis; Iain McCulloch, Editor(s)