Improvement of Dispersion Stability and Optical Properties of CdSe/ZnSe Structured Quantum Dots by Polymer Coating
In this study, CdSe core and CdSe/ZnSe core/shell quantum dots with a narrow size distribution were synthesized in a micro-reactor. A PMMA coating applied to the surface of CdSe/ZnSe core/shell QDs to prevent degradation gave improved dispersion stability compared to the CdSe core and
CdSe/ZnSe core/shell. Many previous approaches to dispersion stability have not been quantitatively assessed. The dispersion stability was confirmed by multiple light scattering measurement. Additionally, the PMMA-coated CdSe/ZnSe QDs showed greatly improved optical properties with a photoluminescence
quantum yield up to 80%. This structural motif is expected to prevent the degradation of QDs.
Document Type: Research Article
Publication date: 01 October 2014
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