Abstract
In this article, mono-dispersed hexagonal structure CdSe nanocrystals with polyhedron shape were prepared by an open solvent thermal reaction. They show a discrete excitonic transition structure in the absorption spectra and the minimal photoluminescence (PL) peak full-width at half-maximum of 19 nm. The PL quantum yield is about 60%. Transmission electron micrographs, high-resolution transmission electron micrographs, x-ray powder diffraction patterns, UV-vis absorption spectra and PL spectra were obtained for the as-prepared CdSe nanocrystals. The size of the CdSe nanocrystals can be tuned by changing the reaction temperature or time. Due to the improved synthesis method, a different growth mechanism of the CdSe nanocrystals is discussed.
Original language | English |
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Pages (from-to) | 2262-2268 |
Number of pages | 7 |
Journal | Chinese Physics |
Volume | 14 |
Issue number | 11 |
DOIs | |
Publication status | Published - 1 Nov 2005 |
Externally published | Yes |
Keywords
- Formation
- Mono-dispersed
- Nanocrystals