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SM ISO690:2012 NEDEOGLO, Natalia, LAIHO, Reino, LÄHDERANTA, Erkki, SIRKELI, Vadim, STAMOV, Vladimir. Changes in donor and acceptor states in Au-doped ZnSe samples induced by ageing at room temperature. In: Journal of Physics Condensed Matter, 2007, vol. 19, pp. 1-11. ISSN 0953-8984. DOI: https://doi.org/10.1088/0953-8984/19/15/156211 |
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Journal of Physics Condensed Matter | ||||||
Volumul 19 / 2007 / ISSN 0953-8984 /ISSNe 1361-648X | ||||||
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DOI:https://doi.org/10.1088/0953-8984/19/15/156211 | ||||||
Pag. 1-11 | ||||||
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Photoluminescence (PL) spectra of n-ZnSe single crystals doped with Au are investigated at temperatures between 4.4 and 300 K immediately after doping and after storage for four years at room temperature in darkness in air. The formation of donor-type Aui interstitial defects stimulated by time is found in ZnSe for the first time. Changes in the structure of the edge and long-wavelength PL spectra with the course of time are observed. The long-wavelength band attributed to (AuZn-DIII,VII) acceptors is not found in the PL spectra of the stored samples. At the same time, a green PL band with maximum at 527 nm (2.35 eV) appears. This band is ascribed to (VZn-Aui) acceptors formed as a result of displacement of the AuZn atoms into interstitial sites due to deformation forces. When the Au concentration in the Zn + Au melt exceeds 1 at.%, an Aui-donor impurity band is formed and the intensities of all the PL bands are reduced. |
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Cuvinte-cheie Engineering controlled terms Crystal impurities, Doping (additives), Semiconductor quantum wells, Single crystals Engineering uncontrolled terms Deformation forces, Donor and acceptor, Donor impurities, Interstitial defects, Interstitial sites, Long-wavelength bands, Photoluminescence spectrum, ZnSe single crystals Engineering main heading Zinc |
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