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Proceedings Paper

Radiative properties of n-ZnSe single crystals doped with Ag
Author(s): Galina N. Ivanova; Vladimir A. Kasiyan; Dmitri D. Nedeoglo; Natalia D. Nedeoglo
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Paper Abstract

Ag impurity exists in ZnSe as interstitial atoms Agi and substitution atoms Agzn. The structure of photoluminescence (PL) spectra of the ZnSe crystals doped with Ag depends on quantitative ratio of these defects in the crystal. Evidently, this is a cause of significant difference of PL spectra of n-ZnSe crystals doped with Ag either in the growing process or in the process of annealing in the Zn+Ag melt. The questions of electron configuration and of a charge state of Ag impurity in ZnSe is discussed also in the literature. Theoretical analysis of this problem allows the existence possibility of Ag multi-charged states in ZnSe, while the authors assume that Ag in ZnSe exists only in the single-charged state with d10-electron configuration. In this work, the PL spectra and photoluminescence excitation (PLE) spectra of n-ZnSe single crystals annealed in Zn melt with Ag contents from 0.1 at.% to 20 at.% are investigated in the temperature range from 82 K to 300 K. The annealing was made at the temperature of 950 degrees Celsius during the 100 h. At the termination of annealing the quartz ampoules were immersed in cold water for the sharp cooling of the samples. Luminescence was excited either by radiation of LGI-21 laser with the wavelength of 337 nm (Eexcit equals 3.68 eV) or by monochromatic light from VSU-1 monochromator with the halogen lamp. The investigation of PL spectra was carried out using MDR-23 monochromator with the line dispersion of 1.4 nm/mm in the wavelength region from 430 nm to 700 nm.

Paper Details

Date Published: 5 May 1999
PDF: 2 pages
Proc. SPIE 3687, International Workshop on Nondestructive Testing and Computer Simulations in Science and Engineering, (5 May 1999); doi: 10.1117/12.347408
Show Author Affiliations
Galina N. Ivanova, State Univ. of Moldova (Moldova)
Vladimir A. Kasiyan, State Univ. of Moldova (Moldova)
Dmitri D. Nedeoglo, State Univ. of Moldova (Moldova)
Natalia D. Nedeoglo, State Univ. of Moldova (Moldova)

Published in SPIE Proceedings Vol. 3687:
International Workshop on Nondestructive Testing and Computer Simulations in Science and Engineering
Alexander I. Melker, Editor(s)

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