Efficient Ambipolar Organic Light-Emitting Transistors Based on 2-Phenyl-Tetracene with Orange Light Emission

Abstract

Light emission is often observed from ambipolar organic field-effect transistors (OFETs) when they are operated in the unipolar regime. Improved performance of p-type organic light-emitting transistors (OLETs) can be obtained by introducing a novel tetracene derivative emission layer and combed source and drain metal electrodes. We employ a novel tetracene derivative, 2-phenyl-tetracene (Ph-TET) [1], as the organic light-emitting transistors' emission material. The prepared OLETs show good optical and electronic properties with high stability. The OLETs exhibit high external quantum efficiency of 2.6% and high charge carrier mobility of 3.2cm2V-1s-1. The OLET gives orange emission thus exhibiting potential value in organic optoelectronics.