Role of Oxide/Metal Bilayer Electrodes in Solution Processed Organic Field Effect Transistors

摘要

High performance, air stable and solution-processed small molecule 2,7-dioctyl[1]benzothieno[3,2-b]benzothiophene (Csub8/sub-BTBT) based organic field-effect transistors (OFETs) with various electrode configurations were studied in detail. The contact resistance of OFET devices with Ag, Au, WOsub3/sub/Ag, MoOsub3/sub/Ag, WOsub3/sub/Au, and MoOsub3/sub/Au were compared. Reduced contact resistance and consequently improved performance were observed in OFET devices with oxide interlayers compared to the devices with bare metal electrodes. The best oxide/metal combination was determined. The possible mechanisms for enhanced electrical properties were explained by favorable morphological and electronic structure of organic/metal oxide/metal interfaces.