Berlin 2018 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 46: Poster Session IV
CPP 46.24: Poster
Mittwoch, 14. März 2018, 11:00–13:00, Poster A
Investigating the influence of morphology on the charge-carrier mobility in organic field-effect transistors — •Tobias Meier1, Heinz Bässler1,2, and Anna Köhler1,2 — 1Experimental Physics II, University of Bayreuth, 95440 Bayreuth, Germany — 2Bayreuth Institute of Macromolecular Research, University of Bayreuth, 95440 Bayreuth, Germany
For organic semiconductors it is well known that the charge-carrier mobility depends sensitively on the morphology of the organic semiconductor film. The charge-carrier mobility, however, is one of the most important properties for the application of organic semiconductors as it determines the performance of devices such as organic solar cells and field-effect transistors (OFETs). Yet, there is no comprehensive theoretical description available for this complex morphology-mobility relationship. Here, we use a kinetic Monte Carlo model to simulate charge transport in OFETs in order to investigate the interplay between the morphology of the semiconductor and the charge-carrier mobility. We focus on the role of conjugation length in the charge transport process and on the importance of ordered domains. Parameters considered include the temperature dependence, charge-carrier concentration and film thickness.