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Citation: ZHAO Hui-Ling, SHEN Huai-Bin, WANG Hong-Zhe, LI Lin-Song. Phosphine-Free Synthesis of High Quality CdSe Nanocrystals and Their Optical Properties[J]. Acta Physico-Chimica Sinica, ;2010, 26(03): 691-694. doi: 10.3866/PKU.WHXB20100315 shu

Phosphine-Free Synthesis of High Quality CdSe Nanocrystals and Their Optical Properties

1.
School of Physics and Electronics, Henan University, Kaifeng 475004, Henan Province, P. R. China; Key Laboratory for Special Functional Materials of Ministry of Education, Henan University, Kaifeng 475004, Henan Province, P. R. China

Received Date: 29 August 2009
Available Online: 21 January 2010

High quality zinc blende CdSe nanocrystals were successfully synthesized using an environmental friendly method. Pre-synthesized cadmium decanoate was used as the Cd precursor and selenium powder dissolved in octadecene was used as the Se precursor. The use of expensive and toxic tributylphosphine or trioctylphosphine was thus avoided. The properties and structures of the as-synthesized CdSe nanocrystals were characterized by absorption spectroscopy, photoluminescence (PL) spectroscopy, X-ray diffraction (XRD), and transmission electron microscopy (TEM). The PL emission peak of the as-synthesized CdSe nanocrystals could be easily tuned from470 to 630 nm using different reaction times. The quality of the crystals was high and this was confirmed by their high quantum yields (exceeding 60%at 535 nm) and their narrow size-distributions with full width at half maximum values between 24 and 30 nm.
- Phosphine-free synthesis,
- Semicondutor Nanocrystal,
- CdSe,
- Optical property
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