Synthesis of CdTe Quantum Dots with Tunable Photoluminescence Using Tellurium Dioxide as Tellurium Source

A simple and convenient method has been developed for synthesis of water-soluble CdTe quantum dots （QDs） under ambient atmospheric conditions. In contrast to the traditional aqueous synthesis, green to red emitting CdTe QDs were prepared by using TeO2 to replace Te or AIzTe3 as tellurium source in t...

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Bibliographic Details
Published in:Chinese journal of chemistry 2012-10, Vol.30 (10), p.2440-2444
Main Author: 刘声燕 王益林 杨昆 周立亚
Format: Article
Language:English
Subjects:
CdTe
chemical synthesis
nanostructures
optical properties
photoluminescence spectroscopy
Quantum dots
二氧化碲
光致发光
可调
合成
碲化镉
荧光量子产率
量子点
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Summary:A simple and convenient method has been developed for synthesis of water-soluble CdTe quantum dots （QDs） under ambient atmospheric conditions. In contrast to the traditional aqueous synthesis, green to red emitting CdTe QDs were prepared by using TeO2 to replace Te or AIzTe3 as tellurium source in this method. The influences of ex- perimental variables, including pH value, 3-mercaptopropionic acid （MPA）/Cd and Te/Cd molar ratios, on the emis- sion peak and photoluminescence （PL） quantum yield （QY） of the obtained CdTe QDs have been systematically investigated. Experimental results indicate that green to red emitting CdTe QDs with a maximum photolumines- cence quantum yield of 35.4% can be prepared at pH 11.3 and rt（Cd） ： n（Te） ： n（MPA）= 1 ： 0.1 ： 1.7.
ISSN:1001-604X
1614-7065
DOI:10.1002/cjoc.201200601