Berlin 2018 – scientific programme
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 77: Organic Electronics and Photovoltaics - Transport and Doping
CPP 77.10: Talk
Friday, March 16, 2018, 12:15–12:30, C 243
The density of states of n-doped organic thin films from simulations and experiments — Christopher Gaul1, Sebastian Hutsch1, Martin Schwarze2, Sebastian Schellhammer1, Fabio Bussolotti3, Satoshi Kera3, Gianaurelio Cuniberti1, Karl Leo2, and •Frank Ortmann1 — 1Center for Advancing Electronics Dresden, TU Dresden, Germany — 2Dresden Integrated Center for Applied Physics and Photonic Materials, TU Dresden, Germany — 3Institute for Molecular Science, Okasaki, Japan
Doping plays a crucial role in semiconductor physics where n-doping is controlled by the ionisation energy of the impurity relative to the conduction band edge. In organic semiconductors, efficient doping may be dominated by different effects, which are presently not well understood. Here, we study n-doping of C60 as prototypical material by simulating the density of states of the doped system in the density functional theory framework. We simulate the Fermi level position which compares well with experimental results from direct and inverse photoemission spectroscopy. From these results, we extract relevant factors that influence the doping efficiency.