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The Effects Of Substitutional Alkaline Metals In Zinc Vacancy Of Zincselenide Single Crystals Grown By The Sublimation Method

Published online by Cambridge University Press:  15 February 2011

Kenji Yoshino ,
Kouji Maeda ,
Atsuhiko Fukuyama ,
Yoshito Akashi ,
Kiyohisa Imada  and
Tetsuo Ikari
Kenji Yoshino
Affiliation:
Department of Electrical and Electronic Engineering, Faculty of Engineering, Miyazaki University, 1–1 Gakuen Kibanadai-nishi, Miyazaki 889-21, Japan.
Kouji Maeda
Affiliation:
Department of Electrical and Electronic Engineering, Faculty of Engineering, Miyazaki University, 1–1 Gakuen Kibanadai-nishi, Miyazaki 889-21, Japan.
Atsuhiko Fukuyama
Affiliation:
Department of Materials Science, Faculty of Engineering, Miyazaki University, 1–1 Gakuen Kibanadai-nishi, Miyazaki 889-21, Japan. +81-895-58-2811, +81-985-58-2876, yoshino@pem.cc.miyazaki-u.ac.jp
Yoshito Akashi
Affiliation:
Department of Materials Science, Faculty of Engineering, Miyazaki University, 1–1 Gakuen Kibanadai-nishi, Miyazaki 889-21, Japan. +81-895-58-2811, +81-985-58-2876, yoshino@pem.cc.miyazaki-u.ac.jp
Kiyohisa Imada
Affiliation:
Department of Materials Science, Faculty of Engineering, Miyazaki University, 1–1 Gakuen Kibanadai-nishi, Miyazaki 889-21, Japan. +81-895-58-2811, +81-985-58-2876, yoshino@pem.cc.miyazaki-u.ac.jp
Tetsuo Ikari
Affiliation:
Department of Electrical and Electronic Engineering, Faculty of Engineering, Miyazaki University, 1–1 Gakuen Kibanadai-nishi, Miyazaki 889-21, Japan.
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Abstract

The photoluminescence measurements of alkaline metal doped zincselenide (ZnSe) single crystals were carried out to investigate how the impurity atoms substitute the intrinsic vacancy. Sample are grown by the sublimation method and the Li and Na with the concentrations of 0.1, 0.25 and 0.5 mol% were incorporated simultaneously. In the PL spectra with lower impurity concentrations, bound exciton lines of deep acceptor and donor-acceptor pair (DAP) bands were clearly observed accompanied by a weak free exciton line. Although the bound exciton lines becomes smaller with increasing the impurity concentration, the DAP band remains strong and its peak energy shift to lower energy side with the concentration. The decrease of the bound exciton lines is drastic for Li-doped sample than Na-doped sample. This indicates that Li atoms more easily occupy the Zn vacancies than Na.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 442: Symposium E – Defects in Electronic Materials II , 1996 , 593
Copyright
Copyright © Materials Research Society 1997

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References

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