科研之友
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摘要
Highly luminescent CdSe/ZnS nanocrystals were prepared in an aqueous solution. CdSe cores capped with thiolglycolic acid (TGA) were coated with a ZnS shell through photochemical decomposition of TGA in a Zn-dispersed solution. The molar ratios of Cd2+:TGA:Se2- upon core synthesis were crucial to obtain CdSe/ZnS showing high photoluminescence (PL) efficiency. High PL efficiency (50%) with narrow spectral width (50 nm) was obtained after photochemically coating the core with a thick ZnS shell after optimizing the solution composition during ultraviolet irradiation.
- 出版日期2011-3-5
