Analytic models for organic field-effect transistors based on exponential and power mobility models

Abstract

The fundamental I–V formula of an organic field effect transistor (OFET) is improved to overcome the divergence of the integrand, so it is very convenient for both numerical calculations and analytic derivations. The analytic I–V formulae are derived based on the exponential mobility model and power-function mobility model, respectively, and the derived analytic formulae are applied to three OFET devices. The results calculated from the reformulated analytic I–V formulae taking in exponential and power function mobility models are all in good agreement with the experimental I–V data. The parameters μ 0 and γ that are extracted from the mobility model and fitted by experimental data show simple Arrhenius temperature dependence and inverse linear relationship with temperature, respectively. These findings are very useful for practical applications and device simulations.