UV-deep blue-visible light-emitting organic field effect transistors with high charge carrier mobilities.

Abstract

Two non-single-crystal high-mobility single-layer light-emitting field-effect transistors (LEFETs) exhibiting narrow UV and deep-blue emission are described. The organic semiconductors are based on a [1]benzothieno[3,2-b][1]benzothiophene (BTBT) scaffold and achieve charge carrier mobilities of 2 and 6 cm2 V−1 s−1, respectively. The general applicability of BTBT-C10 as an excellent semiconductor for LEFETs is then demonstrated in conventional heterostructure LEFETs. Here it acts as a thin charge carrier layer underneath blue, yellow, and red organic light-emitting materials. This layout increases the emissive layers' optical and electrical characteristics by several orders of magnitude. Both device architectures give way toward novel display technologies and potentially injection lasers.