Characterization on Improved Effective Mobility of Pentacene Organic Field-Effect Transistors Using Graphene Electrodes

Pentacene organic field-effect transistors (OFETs) with multilayer graphene (MLG) films as the source and drain electrodes were fabricated. Pentacene OFETs with MLG electrodes showed significantly enhanced electrical property compared to devices with typically used Au electrodes because MLG electrode yields lower contact resistance and lower barrier height. Specifically, the pentacene OFETs with graphene electrodes exhibited increased output current by more than tenfold, high mobility as 0.4 cm(2) V-1 s(-1), and high on/off current ratio of 10(7). Our study may be useful for the development of organic transistors that are capable of producing improved performances. (C) 2012 The Japan Society of Applied Physics