Dresden 2020 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 49: Quantum dots and wires II

HL 49.11: Talk

Wednesday, March 18, 2020, 18:00–18:15, POT 151

Optical properties of a double-dot rod semiconductor — •Marcel Dohrmann, Tobias Kipp, Christian Strelow, and Alf Mews — University of Hamburg, Institute of Physical Chemistry

Due to their heterogenic semiconductor band system, double dot-rod semiconductors have very interesting properties. With three different semiconductor materials, not only classical Type I or Type II systems can be achieved, but also combinations of these. For example, a system like CdSe/CdS/PbS can have two trap regions of holes and electrons. This system has been synthesized in our group and will be analyzed via confocal spectroscopy. The electron and hole wave functions and exciton energies are calculated by a numerical Schrödingers equation solver within the effective mass approximation. Our emission spectra shows two emission maxima, which are in good alignment with our calculations. Therefore this semiconductor system consist of two type I regions, is a double emitter, and could have different decay curves for each wavelength area.