Regensburg 2007 – wissenschaftliches Programm

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SYOE: Symposium Organic Thin Film Electronics: From Molecular Contacts to Devices

SYOE 6: Transport in Organics Materials

SYOE 6.3: Vortrag

Dienstag, 27. März 2007, 15:30–15:45, H32

Macroscopic and Microscopic Simulations of the Charge Transport in Conjugated Polymers — •Carsten Deibel¹, Maria Hammer¹, Andreas Baumann¹, Ingo Riedel², and Vladimir Dyakonov^1,2 — ¹Experimental Physics VI, Physical Institute, Julius-Maximilians- — ²Div. Functional Materials for Energy Technology, ZAE Bayern e.V., Am Hubland, 97074 Würzburg, Germany

The charge carrier mobility is a key characteristic for describing charge transport in disordered organic semiconductors. Its multiple dependencies, e.g. on temperature and electric field, can be understood by considering hopping transport in a gaussian density of states. Microscopically, the hopping process can be looked at by Monte Carlo simulations, with the density of states distribution as input, and the mobility as output parameter. Macroscopically, the numerical solution of the Poisson equation can be utilised. Despite their different approaches, both models are able to give insight into charge transport in conjugated polymers. The application of the simulation results of these two models to experimentally observed transient photoconductivity and space charge limited current experiments of polymer devices will be discussed.