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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.
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