Photoluminescence of zinc selenide single crystals annealed in zinc or selenium atmosphere
Book
·
OSTI ID:80017
- Okayama Univ. (Japan). College of Liberal Arts and Sciences
Zinc selenide single crystals grown by the sublimation method are annealed in Zn or Se atmosphere. The annealing effects are examined by means of photoluminescence (PL) and reflection spectroscopy at 4.2 K. In the PL spectrum for the as-grown crystal, bound exciton lines (I{sub 2}, I{sub 1}) are observed. For the Zn-annealed crystal, the free exciton line is clearly observed. For the Se-annealed crystal, peak positions of all lines shift to the higher energies and all lines become sharp, compared with the spectra for the as-grown crystal. It is concluded that Sc-vacancies affect the bandgap energy more than Zn-vacancies do.
- OSTI ID:
- 80017
- Report Number(s):
- CONF-940411--; ISBN 1-55899-248-0
- Country of Publication:
- United States
- Language:
- English
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