Self Organized Grown Stranski-Krastanow II-VI Quantum Dots Vs. Colloidal Nanocrystals Integrated In Epitaxial Nanostructures

We have integrated colloidal CdSe nanocrystals (NC) in MBE-grown ZnSe layers. In this paper we compare their density, size, size distribution and their optical tuning range with that of self-organized grown Stranski-Krastanow (SK) CdSe-QDs which are used as a reference. We find that the density of e...

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Main Authors: Arens, Ch, Schops, O, Artemyev, M V, Woggon, U, Lischka, K, Schikora, D
Format: Conference Proceeding
Language:English
Online Access:Get full text
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Summary:We have integrated colloidal CdSe nanocrystals (NC) in MBE-grown ZnSe layers. In this paper we compare their density, size, size distribution and their optical tuning range with that of self-organized grown Stranski-Krastanow (SK) CdSe-QDs which are used as a reference. We find that the density of epitaxially overgrown NCs can be varied in a wider range than the SK-QD density. The size and shape of NCs is variable and this leads to a wide optical tuning range of the NC emission. The size of SK-QD is fixed due to the thermodynamic formation process. Further we found, that the size distribution of overgrown NCs is in the range of the size distribution of SK-QDs or even smaller.
ISSN:0094-243X
DOI:10.1063/1.2730268