Berlin 2012 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 2: Focus Session: Structural Ordering and Electronic Transport I (jointly with CPP)

HL 2.10: Talk

Monday, March 26, 2012, 12:45–13:00, ER 270

Temperature and carrier concentration dependent analysis of charge transport in Poly (3-hexylthiophene) based organic field effect transistors — •Hippolyte Hirwa and Veit Wagner — School of Engineering and Science Jacobs University Bremen Campusring 1, D-28759 Bremen (Germany)

A crucial step of organic electronics towards applications is the understanding and exploiting of their charge transport mechanisms. Several models have been previously developed in order to explain the behavior of organic semiconductors. These proposed models (e.g. Vissenberg Matters model, multiple trapping and release model and Neldel Meyer rule) try to include effects like temperature dependence, charge carrier concentration dependence and field dependence. However, these models can not fully explain our experimental data obtained on P3HT based organic field effect transistors manufactured on flexible PET foils. The Neldel Meyer rule hardly showed agreement with our experimental data. The Vissenberg and Matters model and the multiple trapping and release model showed a good agreement but only over a limited temperature range. For temperatures below 170K an additional transport mechanism is observed which is explained by a modification of the Vissenberg and Matters model.