Dresden 2017 – wissenschaftliches Programm
CPP 55.7: Vortrag
Donnerstag, 23. März 2017, 12:30–12:45, ZEU 222
Charge Transport in Rubrene Crystals: Dynamic Disorder and Polarons — •Michel Panhans1, Desanka Boskovic2, Pablo Ordejòn2,3, and Frank Ortmann1 — 1Institute for Material Science, Dresden Center for Computational Material Science and Center for Advancing Electronics Dresden, TU Dresden — 2ICN2 - Institut Catala de Nanociencia i Nanotecnologia, Barcelona — 3CSIC - Consejo Superior de Investigaciones Cientificas, Barcelona
The understanding of charge transport in small-molecule organic semiconductors remains a challenge despite various experimental and theoretical studies in recent years. This is mainly because transport phenomena in organic semiconductors are strongly influenced by vibrations and disorder effects (such as traps, dopants, structural disorder, etc.).
We investigate the temperature dependent p-type charge transport in rubrene crystals including the electron-phonon interaction. This interaction can be either described in terms of vibrational disorder or polaronic effects with different implications for the temperature dependent carrier mobility. We present a new mixed approach with an empirical phonon cutoff energy to study the transition from a semi-classical to a quantum description of electron-phonon interaction.