Abstract
The traditional colloidal routes of fabrication of II-VI semiconductor quantum dots have been difficult to integrate with silicon technology. Here, we demonstrate that CdSe quantum dots and rods can be self-assembled and delivered in ultrahigh vacuum conditions on almost any substrate by means of buffer-layer-assisted growth (BLAG), where the buffer is thin solid Xe film. We determine the diffusivity of the particles on the buffer, and demonstrate the significance of the ionicity of the CdSe. Photoluminescence spectra are compared to the previous studies of colloidal CdSe structures. This study opens the door for the synthesis of tunable II-VI heterostructures.
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