Chem. J. Chinese Universities ›› 2013, Vol. 34 ›› Issue (1): 45.doi: 10.7503/cjcu20120227

• Article: Inorganic Chemistry • Previous Articles     Next Articles

Aqueous Synthesis of CdTe Quantum Dots from Hydrazine Hydrate and Tellurium Dioxide

WANG Yi-Lin, LIU Sheng-Yan, MO Feng-Ping, PAN Hua-Qiao   

  1. School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
  • Received:2012-03-16 Published:2012-12-31

Abstract:

A one-step method was developed for the synthesis of thioglycolic acid(TGA)-capped CdTe quantum dots(QDs) in an aqueous medium when tellurium dioxide worked as a tellurium source and hydrazine hydrate acted as a reductant. The influence of experimental conditions, including refluxing time, molar ratio of tellurium to cadmium and molar ratio of TGA to cadmium, on the growth rate and luminescent properties of the obtained CdTe QDs were systematically investigated. Furthermore, the obtained QDs were characterized by fluorescent spectroscopy, powder X-ray diffraction(XRD) and transmission electron microscopy(TEM). Experimental results indicated that the growth time and the relative quantities of reactants impacted the growth rate and optical properties of QDs. The proposed method enables us to obtain cubic CdTe QDs with high photoluminescence quantum yield(up to 26%) and a broad emission color tunable from green to red.

Key words: CdTe quantum dots, Aqueous synthesis, Luminescence, Hydrazine hydrate

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