Self-encapsulation of organic thin film transistors by means of ion implantation

Abstract

Long-term stability of devices based on organic materials is still impeding the diffusion of these\ud structures in real applications. In this paper we have investigated the effects of low energy, combined, ion\ud implantation (N and Ne) in the evolution of the electrical performances of pentacene-based Organic Thin\ud Film Transistors (OTFTs) over time by means of current–voltage and photocurrent spectroscopy analyses.\ud We have demonstrated that the selected combination of ions allows reducing the degradation of charge\ud carriers mobility, and also stabilization of the devices threshold voltage over a long time (over 2000 h)

Review—Charge Carrier Mobility of Organic Thin Film Transistor: Intrinsic and Extrinsic Influencing Factors Based on Organic Semiconducting Materials

“…206 Exposure of the organic semiconductor to oxygen and moisture leads to the local doping or occurrence of oxidation of organic molecules and results in the degradation of the charge transport properties of the active layer, 207 increase in the threshold voltage, and decrease in the carrier mobility. 208 This instability of the organic semiconductor may relate to the distance of the LUMO of the semiconductor from the vacuum level. 209,210 In order to achieve an environmentally stable transistor under electrical stress and produce a stable circuit with good performance, a protective encapsulation layer is needed to keep the device from exposure to the ambient environment after the deposition of the organic semiconducting layer.…”