High-quality CdTe Quantum Dots Synthesized in Liquid Paraffin Wax

Chem. J. Chinese Universities

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High-quality CdTe Quantum Dots Synthesized in Liquid Paraffin Wax

XING Bin, LI Wan-Wan, DOU Hong-Jing, SUN Kang*

State Key Lab of Metal Matrix Composites, Shanghai Jiaotong University, Shanghai 200240, China

Received:2007-08-20 Revised:1900-01-01 Online:2008-02-10 Published:2008-02-10
Contact: SUN Kang

Abstract

Abstract: A novel route was developed to synthesize high quality oil soluble CdTe quantum dots. Liquid pa-raffin wax system was used to replace tri-n-octylphosphine oxide(TOPO) as the solvent for the synthesis of highly luminescent CdTe QDs at relatively low temperatures(200—260 ℃). Compared with TOPO, liquid paraffin is cheaper, more friendly to environmentally, and more stable in the air. The effects of the reaction temperature, growth time, precursor concentration, and the quantities of the ligands on the properties of the CdTe QDs were investigated in this paper. This new route reduces the raw material cost and enables us to obtain CdTe QDs with a broad emission spectral ranging from 570 to 720 nm at relatively low temperatures. The as-prepared CdTe QDs also possess a high PLQY(up to 65%) and good thermal stability.

Key words: Quantum dots, CdTe, Oil solubility, Liquid paraffin wax, Thermal stability

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XING Bin, LI Wan-Wan, DOU Hong-Jing, SUN Kang*. High-quality CdTe Quantum Dots Synthesized in Liquid Paraffin Wax[J]. Chem. J. Chinese Universities, doi: .

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High-quality CdTe Quantum Dots Synthesized in Liquid Paraffin Wax

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