Mobility model for compact device modeling of OTFTs made with different materials

In this paper we present a new approach to model mobility in organic thin film transistors, OTFTs, which is used to analyze the behavior of mobility in devices made of poly(methyl methacrylate), PMMA, on poly(3-hexylthiophene), P3HT, recently reported by us. It is also used to discuss differences observed between OTFTs made with other polymers and oligomers. The method allows the calculation of the characteristic temperature and energy distribution of localized states (DOS) in the active layer, considering an exponential distribution. It is also shown that using the extracted DOS parameters as input DOS parameters in ATLAS simulator, it is possible to reproduce very well the device characteristics.