Berlin 2012 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
HL: Fachverband Halbleiterphysik
HL 68: Photovoltaics: Organic Semiconductors
HL 68.6: Vortrag
Mittwoch, 28. März 2012, 19:00–19:15, ER 270
Time and Spatially Resolved 1D-MonteCarlo Simulations on Charge Transport — •Manuel Ruf1, Jens Lorrmann1, Vladimir Dyakonov1,2, and Carsten Deibel1 — 1Experimental Physics VI, Julius Maximilian University of Würzburg, D-97074 Würzburg — 2ZAE Bayern, D-97074 Würzburg
Charge transport in organic materials is one of the limiting steps for highly efficient solar cells. Further insight into the microscopic processes promise a better
unterstanding of the underlying charge transport.
In this study we describe charge transport by a one dimensional Monte Carlo (1D-MC) simulation, which is based on multiple trapping and release events of charge carriers
into a density of trap states while moving through the sample due to thermal and electric field energy.
As long as a charge carrier is trapped, its contribution to current is zero. The actual form of the density of trap states determines the charge carrier release time
therefore affecting the shape of the transient.
The time dependence of the model allows simulation of transient measurement techniques, such as Time-Of-Flight (TOF) or charge extraction by linear increasing voltage (CELIV).
Hence we can probe the individual behaviour of single charge carriers,
which allows studies of propagation of the spatial charge carrier distribution and energetic relaxation for different model parameters.
The simplicity of this model provides low computing times, yet allows to reproduce physical behaviour as observed in measurements
on regio regular poly(3-hexyl thiophene-2,5-diyl) (P3HT 4002E).