Organic Light Emitting Field Effect Transistors: Advances and Perspectives

Abstract

Light emitting field effect transistors based on molecular and polymeric organic semiconductors are multifunctional devices that integrate light emission with the current modulating function of a transistor. The planar geometry of organic light emitting field effect transistors (OLEFETs) offers direct access to the light emission region, providing a unique experimental configuration to investigate fundamental optical and electronic properties in organic semiconductors. OLEFETs show great potential for technological applications such as active matrix full color electroluminescent displays. In this Feature Article we review advances in OLEFETs since their first demonstration in 2003 and we highlight exciting challenges associated with their future development.

Direct observation of the charge carrier concentration in organic field-effect transistors by electron spin resonance

“…[1][2][3] Light-emitting properties of organic FETs have also been reported. 4,5 The studies of charge carriers in these devices are of fundamental importance in understanding the basic physical processes, such as carrier injection, accumulation, and transport, and hence, may contribute to the formulation of the design principle of highly efficient devices. However, intrinsic transport properties in the devices tend to be masked due to the molecular disorders at the device interfaces.…”

Alkylated oxygen-bridged V-shaped molecules: impacts of the substitution position and length of the alkyl chains on the crystal structures and fundamental properties in aggregated forms

“…The DNF-V based organic semiconductor with high carrier mobility and a high luminescence property could be a promising candidate for organic light-emitting transistors. 15 In this article, we systematically investigate alkylated DNF-V derivatives (herein referred to for 3,9-substitution as C n -DNF-VWs and for 2,10-substitution as C n -DNFVVs) and shed light on the impact of the substitution position and the length of the alkyl side chains on their physicochemical properties and packing structures, solubilities, thermal properties and photophysical properties. Intriguingly, as the shorter alkyl chains are substituted on the C n -DNF-VVs, these molecules possess a higher solubility of over 1.0 wt% and a higher phase-transition temperature of~200°C.…”

Half-gate light-emitting electrochemical transistor to achieve centered emissive organic p–n junction

“…After the invention of organic light-emitting diodes in 1990 1 , other organic optoelectronic devices have been demonstrated, such as lightemitting electrochemical cells (LEC) [2][3][4] and light-emitting transistors (LET) [5][6][7][8] .…”