Regensburg 2010 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

HL: Fachverband Halbleiterphysik

HL 59: Quantum Dots and Wires, Optical Properties V

HL 59.2: Vortrag

Donnerstag, 25. März 2010, 16:15–16:30, H14

Quantum Kinetics of Multiple Exciton Generation in Quantum Dots — •Franz Schulze, Carsten Weber, and Andreas Knorr — Institut für Theoretische Physik, Technische Universität Berlin, Germany

The simultaneous generation of multiple excitons in quantum dots by a single photon, called multiple exciton generation (MEG), is of special interest for increasing the photovoltaic conversion efficiency [1,2]. We investigate the quantum kinetics of the creation of multiple excitons in multilevel quantum dots within a density matrix approach and present corresponding numerical results. We focus on the Auger-type Coulomb processes of impact ionization and Auger recombination to derive the equations of motion for exciton densities, electron densities and coherences.
R. J. Ellingson et al., Nano Lett. 5, 865 (2005)
P. Kowalski, P. Machnikowski, Acta Phys. Pol. A 114, 1187 (2008)