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Blue Light Emission from Germanium Ultrafine Particles by the Gas Evaporation Technique

Published online by Cambridge University Press:  28 February 2011

Shinji Nozaki ,
S. Sato ,
A. Denda ,
H. Ono  and
H. Morisaki
Shinji Nozaki
Affiliation:
The University of Electro-Communications, Department of Communications and Systems, 1-5-1 Chofugaoka, Chofu-shi, Tokyo 182, Japan
S. Sato
Affiliation:
The University of Electro-Communications, Department of Communications and Systems, 1-5-1 Chofugaoka, Chofu-shi, Tokyo 182, Japan
A. Denda
Affiliation:
The University of Electro-Communications, Department of Communications and Systems, 1-5-1 Chofugaoka, Chofu-shi, Tokyo 182, Japan
H. Ono
Affiliation:
The University of Electro-Communications, Department of Communications and Systems, 1-5-1 Chofugaoka, Chofu-shi, Tokyo 182, Japan
H. Morisaki
Affiliation:
The University of Electro-Communications, Department of Communications and Systems, 1-5-1 Chofugaoka, Chofu-shi, Tokyo 182, Japan
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Abstract

The ultrafine particles with diameters in the order of 10 nm were deposited onto Si and SiO2 substrates by evaporation of Ge in a pure hydrogen atmosphere. Although the as-deposited Ge ultrafine particles do not show any detectable luminescence, they emit blue light after being exposed to the UV light for a long time. The blue light is strong enough to be seen with the naked eye even under a room light. The photooxidation, unique to the Ge ultrafine particles, has been identified as a major factor contributing to the blue light emission.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 358: Symposium F – Microcrystalline and Nanocrystalline Semiconductors , 1994 , 133
Copyright
Copyright © Materials Research Society 1995

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References

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