ONE-POT SYNTHESIS OF HIGHLY LUMINESCENT CdTe QUANTUM DOTS USING SODIUM TELLURITE AS TELLURIUM SOURCE IN AQUEOUS SOLUTION

被引：24

作者：

Wang, Yilin ^{[1
]}

Liu, Shengyan ^{[1
]}

机构：

[1] Guangxi Univ, Coll Chem & Chem Engn, Nanning 530004, Peoples R China

来源：

JOURNAL OF THE CHILEAN CHEMICAL SOCIETY | 2012年 / 57卷 / 02期

关键词：

cadmium tellurium; quantum dots; sodium tellurite; photoluminescence; NANOCRYSTALS; PHOTOLUMINESCENCE; FLUORESCENCE; EFFICIENCY; QUALITY; CDSE; SIZE;

D O I：

10.4067/S0717-97072012000200011

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A novel technology has been developed for the synthesis of thioglycolic acid (TGA)-capped CdTe quantum dots (QDs) in aqueous medium. The reaction was carried out in air atmosphere with one-pot by using Na2TeO3 to replace Te or Al2Te3. The mechanism for the formation of CdTe QDs is elucidated. The influences of various experimental variables, including refusing time, pH value. Cd/Te and Cd/TGA molar ratios, on the luminescent properties of the obtained CdTe QDs have been systematically investigated. Furthermore, the obtained QDs were characterized by fourier transform infrared spectra (FTIR). X-ray powder diffraction (XRD) and transmission electron microscopy (TEM), respectively. The results demonstrate that,. under the optimized experimental conditions, the obtained CdTe QDs exhibited a narrow photoluminescence band (fwhm33-45 nm) with reproducible room-temperature quantum yields as high as 28%, the emission color is tunable from green to orange with increasing diameter of QDs.

引用

页码：1109 / 1112

页数：4

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