Berlin 2018 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 13: Poster Session I

HL 13.52: Poster

Monday, March 12, 2018, 17:30–19:30, Poster B

Applicability and limitations of hopping-based transport theories — •Sebastian Hutsch and Frank Ortmann — Center for Advancing Electronics Dresden, Technische Universität Dresden, 01062 Dresden, Germany

Many theories have been developed to describe charge transport in organic semiconductors, which is a complex task due to the strong electron-phonon coupling. Two of the most commonly used approaches use hopping-rates based on the classical Marcus theory and on the more advanced Levich-Jortner theory, which distinguishes classical and quantum mechanical contributions of the phonons. In this work, based on ab-initio material parameters, we test the applicability of both theories for a broad range of established organic crystals. The variety of materials allows us to assess the accuracy of both methods and to introduce a classification. The physical reasons for the different behaviour is analyzed and suggestions for an improved method are given.