发明授权
- 专利标题： Two-phase thermal method for preparation of cadmium sulfide quantum dots
- 专利标题（中）： 用于制备硫化镉量子点的两相热法
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申请号： US11158111申请日： 2005-06-21
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公开(公告)号： US07476599B2公开(公告)日： 2009-01-13
- 发明人: Qiang Wang , Daocheng Pan , Xiangling Ji , Shichun Jiang , Lijia An
- 申请人： Qiang Wang , Daocheng Pan , Xiangling Ji , Shichun Jiang , Lijia An
- 申请人地址： CN Changchun CN Changchun
- 专利权人： Changchun Institute of Applied Chemistry,Chinese Academy of Sciences
- 当前专利权人： Changchun Institute of Applied Chemistry,Chinese Academy of Sciences
- 当前专利权人地址： CN Changchun CN Changchun
- 代理机构： Fliesler Meyer LLP
- 优先权： CN200410010942 20040622
- 主分类号： H01L21/20
- IPC分类号： H01L21/20 ; H01L21/36
摘要：
A two-phase thermal method for the preparation of cadmium sulfide quantum dots where a cadmium source, a sulfur source and a capping agent are heated in water and water-insoluble organic solvents forming a two-phase system. By means of varying reaction time, cadmium sulfide quantum dots of different sizes can be prepared. Quantum dots already obtained can be used as crystal seeds in the reaction of newly added reaction precursor to give larger sized quantum dots with a size distribution similar to that of the initial crystal seeds so as to realize the control of quantum dot size. The quantum dots obtained in the present invention have relatively narrow size distribution, and emit royal purple or blue light under ultraviolet lamp, with a photoluminescence quantum efficiency of from 3 to 60%.
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