Top-Contact Pentacene-Based Organic Thin Film Transistor (OTFT) with N,N′-Bis(3-Methyl Phenyl)-N,N′-Diphenyl Benzidine (TPD)/Au Bilayer Source-Drain Electrode

Abstract

A top-contact Pentacene-based organic thin film transistor (OTFT) with N,N′-Bis (3-methyl phenyl)-N,N′-diphenyl benzidine (TPD)/Au bilayer source-drain electrode is reported. The devices with TPD/Au bilayer source-drain (S-D) electrodes show better performance than the single layer S-D electrode OTFT devices. The field-effect mobility of 4.13 cm2 v−1 s−1, the on–off ratio of 1.86 × 107, the threshold voltage of −4 v and the subthreshold slope of .27 v/decade, respectively, are obtained from the device with a TPD/Au bilayer source-drain electrode.