Preparation and Luminescent Properties of CdSe and Core-Shell CdSe/CdS Quantum Dots in Aqueous Solution

doi:10.3724/SP.J.1077.2006.00322

Journal of Inorganic Materials

• Research Paper • Previous Articles Next Articles

Preparation and Luminescent Properties of CdSe and Core-Shell CdSe/CdS Quantum Dots in Aqueous Solution

TANG Ai-Wei, TENG Feng, GAO Yin-Hao, LIANG Chun-Jun, WANG Yong-Sheng

Institute of Optoelectronic Technology and Laboratory of Information Storage, Display and Materials, Beijing Jiaotong University, Beijing 100044, China

Received:1900-01-01 Revised:1900-01-01 Published:2006-03-20 Online:2006-03-20

Abstract

Abstract: CdSe and core/shell CdSe/CdS quantum dots (QDs) were prepared in aqueous solution by using mercapto-acetate acid as stabilizer.Their luminescence characterization was studied by UV-Vis absorption and emission spectra. The nanocrystals were characterized by
X-ray powder diffraction (XRD), transmission electron microscope (TEM) and
X-ray photoelectron spectroscopy (XPS), which were used to characterized their
structure, shape and composition. The results indicated that the quantum dots
synthesized with this method possessed better dispersibility, as well as the
intensity of luminescence of the quantum dots modified the surface was
enhanced greatly and the red shift was shown in the emission and absorption
spectra. The position of absorption peak was different with the different
quantum dots’ sizes.

Key words: quantum dots, aqueous solution, preparation, characterization

TANG Ai-Wei,TENG Feng,GAO Yin-Hao,LIANG Chun-Jun,WANG Yong-Sheng. Preparation and Luminescent Properties of CdSe and Core-Shell CdSe/CdS Quantum Dots in Aqueous Solution[J]. Journal of Inorganic Materials, DOI: 10.3724/SP.J.1077.2006.00322.

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Preparation and Luminescent Properties of CdSe and Core-Shell CdSe/CdS Quantum Dots in Aqueous Solution

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