Role of Oxide/Metal Bilayer Electrodes in Solution Processed Organic Field Effect Transistors
High performance, air stable and solution-processed small molecule 2,7-dioctylbenzothieno[3,2-b]benzothiophene (C8-BTBT) based organic field-effect transistors (OFETs) with various electrode configurations were studied in detail. The contact resistance of OFET devices with Ag, Au, WO3/Ag, MoO3/Ag, WO3/Au, and MoO3/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.
A. Ablat, A. Kyndiah, G. Houin, T. Yilmaz Alic, L. Hirsch & M. Abbas
Scientific Reports volume 9, Article number: 6685 (2019)