Dresden 2017 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 49: Quantum Dots: Optical Properties III

HL 49.6: Vortrag

Mittwoch, 22. März 2017, 11:15–11:30, POT 151

Optical and theoretical investigation of fluorescence spectral diffusion of CdSe/CdS dotrods — •Sven-Hendrik Lohmann, Christian Strelow, Tobias Kipp, and Alf Mews — Institut für Physikalische Chemie, Universität Hamburg, Grindelallee 117, 20146 Hamburg, Deutschland

Here we investigate the photoluminescence properties of individual chemically-synthesized dotrods, which consist of a spherical CdSe core enclosed by an elongated CdS shell. Time- and wavelength-resolved data were collected at low temperature to analyze the spectral diffusion of the emission. We observe a correlation between the energy and the decay time of the emission. This trend was modelled by theoretical calculations, which include migrating surface charges to describe the fluorescence jittering. Our model calculations show good agreement with our experimental studies.