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.
Received: 24 March 2005
Revised: 30 May 2005
Accepted manuscript online:
Miao Yan-Ming (苗雁鸣), Li Chao-Rong (李超荣), Cao Li (曹立), Liu Rui-Bin (刘瑞斌), He Yu-Ping (何玉平), Xie Si-Shen (解思深), Zou Bing-Suo (邹炳锁) Formation and spectroscopic characterization of mono-dispersed CdSe nanocrystals 2005 Chinese Physics 14 2262
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