Investigation the Dependence of Mobility on Carrier Concentration and Temperature in Organic Semiconductors

Subject Areas : Journal of Physical & Theoretical Chemistry

Ali  Mahmoudloo ¹ (Department of Basic Science, Farhangian University, Tehran. Iran)

Received: 2022-11-15 Accepted : 2023-04-01 Published : 2022-03-01

Keywords: Percolation theory, Charge carrier mobility, Organic semiconductor, amorphous organic materials,

Abstract :

The charge carrier mobility is a key performance criteria for organic semiconductors. High-mobility values allow fast device operation as needed for low-cost electronics on large areas with performance meeting market demands. Mobility is conveniently extracted from thin film transistors (TFT) characteristics using the standard gradual channel approximation model. This approach evaluates the mobility of charges during their transport through the high-density accumulation layer at the semiconductor-dielectric interface. This value is therefore directly representative of transistor operation and is a relevant parameter for device integration into circuits. In this paper we have calculated the mobility of an organic semiconductor, one can use percolation theory,. The current flows through the bonds connecting the sites in the network. So far, much attention has been devoted to explain the temperature dependence of the mobility. The model gives a non-Arrhenius-type temperature dependence, which has also been supported by numerical simulations and analytical calculations.

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