Synthesis of Highly Emissive, Color\|tunable CdTe Quantum Dots in Aqueous Solution

Chem. J. Chinese Universities ›› 2011, Vol. 32 ›› Issue (12): 2727.

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Synthesis of Highly Emissive, Color\|tunable CdTe Quantum Dots in Aqueous Solution

WANG Yi-Lin*, HUANG Wu, WANG Rong-Fang, ZHOU Li-Ya

School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China

Received:2011-04-22 Revised:2011-08-01 Online:2011-12-10 Published:2011-11-25
Contact: WANG Yi-Lin E-mail:ylinwang2002@yahoo.com.cn
Supported by:
国家自然科学基金(批准号: 61066006)和广西大学科研基金(批准号: XBZ110359)资助.

Abstract

Abstract: A novel technology was developed for the synthesis of mercaptosuccinic acid(MSA)-capped CdTe quantum dots(QDs) when sodium tellurite worked as a tellurium source and sodium borohydride acted as a reductant. The influences of various experimental variables, including pH value, Cd/Te and Cd/MSA molar ratios, on the photoluminescence(PL) quantum yield(QY) of the prepared CdTe QDs were systematically investigated. The obtained QDs were characterized by photoluminescence spectroscopy, X-ray powder diffraction(XRD) and transmission electron microscopy(TEM). The results show that the CdTe QDs are of zinc-blended crystal structure in a sphere-like shape; various luminescent CdTe QDs with high emission efficiency(maximum quantum yield of 73.3%) can be prepared at pH=10.5 and n(Cd2+):n(Te2-):n(MSA)=1:0.05:1.4.

Key words: Cadmium telluride, Quantum dot; , Photoluminescence

CLC Number:

O611.4

TrendMD:

WANG Yi-Lin*, HUANG Wu, WANG Rong-Fang, ZHOU Li-Ya. Synthesis of Highly Emissive, Color\|tunable CdTe Quantum Dots in Aqueous Solution[J]. Chem. J. Chinese Universities, 2011, 32(12): 2727.

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Synthesis of Highly Emissive, Color\|tunable CdTe Quantum Dots in Aqueous Solution

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