| Formation and spectroscopic characterization of mono-dispersed CdSe nanocrystals |
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| 作者姓名： | 苗雁鸣 李超荣 曹立 刘瑞斌 何玉平 解思深 邹炳锁 |
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| 作者单位： | Nanoscale Physics and Device Laboratory, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China;Nanoscale Physics and Device Laboratory, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China;Nanoscale Physics and Device Laboratory, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China;Nanoscale Physics and Device Laboratory, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China;Nanoscale Physics and Device Laboratory, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China;Nanoscale Physics and Device Laboratory, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China;Nanoscale Physics and Device Laboratory, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China |
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| 基金项目： | Project supported by the 973 Project (Grant No 2002CB713802) and Key Project and Hundred Talents Project of Chinese Academy of Sciences. |
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| 摘 要： | 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 19nm. 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.
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| 关 键 词： | 分光镜 纳米晶体 热量反应 离散激子跃迁 吸收光谱 光致发光 |
| 收稿时间： | 2005-03-24 |
| 修稿时间： | 2005-03-242005-05-30 |
Formation and spectroscopic characterization of mono-dispersed CdSe nanocrystals |
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| Miao Yan-Ming,Li Chao-Rong,Cao Li,Liu Rui-Bin,He Yu-Ping,Xie Si-Shen and Zou Bing-Suo.Formation and spectroscopic characterization of mono-dispersed CdSe nanocrystals[J].Chinese Physics B,2005,14(11):2262-2268. |
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| Authors: | Miao Yan-Ming Li Chao-Rong Cao Li Liu Rui-Bin He Yu-Ping Xie Si-Shen and Zou Bing-Suo |
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| Institution: | Nanoscale Physics and Device Laboratory, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China |
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| 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. |
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| Keywords: | mono-dispersed nanocrystals formation |
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