Regensburg 2019 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 9: Organic Electronics and Photovoltaics I - Charge Transport and Electronic Devices

CPP 9.7: Vortrag

Montag, 1. April 2019, 17:00–17:15, H18

Hopping-approach in organic semiconductors: mode-resolved vibrations and improved time-consistency — •Sebastian Hutsch and Frank Ortmann — Center for Advancing Electronics Dresden, Technische Universität Dresden, Germany

The charge carrier mobilities of different organic semiconductor systems can span several orders of magnitude, making the precise description of different transport regimes necessary. When a localization of the charge carrier is expected, e.g. due to a strong electron-phonon coupling, the transport is assumed to be hopping-like. This regime is usually treated within the Marcus theory or Levich-Jortner theory, which however approximate the rich vibrational spectrum of organic semiconductors, for example in the high-temperature limit. We are presenting a hopping-approach that overcomes these limitations by treating the intramolecular modes in a mode-resolved fashion. This refined approach further allows to individually treat each mode statically or dynamically in the calculation of the hopping-rate, i.e. ensure the time-consistency in the treatment of the vibrations.