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Synthesis of Highly Photoluminescent CdTe Nanocrystals and Their Incorporation into Glass Matrices

Published online by Cambridge University Press:  26 February 2011

Norio Murase  and
Chunliang Li
Norio Murase
Affiliation:
Photonics Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 1–8–31 Midorigaoka, Ikeda, Osaka 563–8577, Japan
Chunliang Li
Affiliation:
Photonics Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 1–8–31 Midorigaoka, Ikeda, Osaka 563–8577, Japan
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Abstract

Photoluminescence (PL) efficiency of thioglycolic-acid (TGA)-stabilized CdTe nanocrystals in water depends strongly on the amount of TGA upon synthesis. The less the amount, the higher the PL efficiency obtained if the colloid is not precipitated. When the molar ratio of TGA against Cd2+ upon preparation is ca. 1.3, PL efficiency of as-prepared solution becomes the maximum and exceeds 60% in red-emitting region. In this case, the spectral widths of the PL become the minimum. We have encapsulated these highly luminescent nanocrystals into glass matrices by using a sol-gel method. Silane coupling agent having an amino-group is effective to preserve the surface of the nanocrystals. The glass thus prepared is stable and shows PL efficiency as high as 40%.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 829: Symposium B – Progress in Compound Semiconductor Materials IV – Electronic and Optoelectronic Applications , 2004 , B3.6
Copyright
Copyright © Materials Research Society 2005

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References

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