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HL: Fachverband Halbleiterphysik
HL 59: Quantum Dots and Wires, Optical Properties V
HL 59.2: Talk
Thursday, March 25, 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.
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P. Kowalski, P. Machnikowski, Acta Phys. Pol. A 114, 1187 (2008)