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Improvement of Dispersion Stability and Optical Properties of CdSe/ZnSe Structured Quantum Dots by Polymer Coating
- Authors
- Kwon, Young-Tae; Eom, Nu Si A.; Choi, Yo-Min; Kim, Bum-Sung; Kim, Taek-Soo; Lee, Chan-Gi; Lee, Kun-Jae; Choa, Yong-Ho
- Issue Date
- Oct-2014
- Publisher
- American Scientific Publishers
- Keywords
- Quantum Dot; Micro-Reactor; Polymer Coating; Dispersion Stability; Optical Properties
- Citation
- Journal of Nanoscience and Nanotechnology, v.14, no.10, pp.7636 - 7640
- Indexed
- SCIE
SCOPUS
- Journal Title
- Journal of Nanoscience and Nanotechnology
- Volume
- 14
- Number
- 10
- Start Page
- 7636
- End Page
- 7640
- ISSN
- 1533-4880
- Abstract
- 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.
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