Abstract
This paper presents the electrical behavior of the top contact/ bottom gate of an organic field-effect transistor (OFET) utilizing Pentacene as a semiconductor layer with two distinctive gate dielectric materials Polyvinylpyrrolidone (PVP) and Zirconium oxide (ZrO2) were chosen. The influence of the monolayer and bilayer gates insulator on OFET performance was investigated. MATLAB software was used to simulate and determine the electrical characteristics of a device. The output and transfer characteristics were studied for ZrO2, PVP and ZrO2/PVP as an organic gate insulator layer. Both characteristics show a high drain current at the gate dielectric ZrO2/PVP equal to -0.0031A and -0.0015A for output and transfer characteristics respectively, this can be attributed to an increase in the dielectric capacitance. Trans conductance characteristics also studied the gate dielectric materials and show the ZrO2/PVP gate dielectric having a higher value from the monolayer, indicating the effect of dielectric capacitance.
Highlights
Small molecular organic semiconductors have a great interest because of their good facilities, lightweight, and easy fabrication under the ambient condition at low cost [1]
Pentacene is a promising material for a modern application, it is an organic semiconductor molecule (C22H14) with high mobility and carrier and the most promising p-type materials to use in the fabrication of organic field-effect transistor (OFET) devices, typically its charge carrier mobility's ranging between 0.1 – 0.7 cm2/V.s. [7]
The gate dielectric materials and the interface between the gate dielectric materials and the active region are very effective in OFET performance
Summary
Small molecular organic semiconductors have a great interest because of their good facilities, lightweight, and easy fabrication under the ambient condition at low cost [1]. The importance of organic semiconductors appears in devices such as transistors[2], solar cells [3], sensors [4], light-emitting diode [5] These materials typically exhibit low charge carrier mobility, poor environmental stability and a short operational lifetime comparing with inorganic counterparts [6]. Among these small semiconductors, Pentacene is a promising material for a modern application, it is an organic semiconductor molecule (C22H14) with high mobility and carrier and the most promising p-type materials to use in the fabrication of organic field-effect transistor (OFET) devices, typically its charge carrier mobility's ranging between 0.1 – 0.7 cm2/V.s.
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