Bidimensional modelling of pentacene TGTC OTFT

Modern electronics has been shifting these two last decades significantly towards organic materials based on their specific electroactivity, a small molecules Pentacene (C14H22) is widely used as p-type semiconductor channel in thin-film transistors (TFTs) and has high mobility. In this study, a 2-dimensional modelling under Silvaco Software is adopted. The TFT behaves like MOSFET, so a high-k (εr) dielectric material between the gate and organic semiconductor (OSC) helps to control the transfer of charge carriers and increase their accumulation inside the channel leading to estimable OTFT performances. Thus, the Al2O3 shows the best OTFT characteristics and parameters compared to SiO2, PMMA and HFO2. Poly(3-hexylthiophene) (P3HT) It is a p-type organic semiconductor with interesting properties. P3HT based OTFT exhibits a rapid response at low gate voltage compared to that based on Pentacene under the same conditions (length, width, and topology) but its low mobility still limits considerably all its characteristics.