Impurity- and defect-related luminescence of ZnSe:Fe at Low Temperatures
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Polycrystalline zinc selenide is doped with an iron impurity to a concentration of ~1019 cm−3 in a zinc vapor atmosphere by the thermal diffusion method, and the distribution profile of optically active iron Fe2+ is obtained. The effect of the Fe2+ concentration on impurity-and defect-related ZnSe luminescence spectra at low temperatures is determined. In the range of 1.28—1.31 eV, a luminescence line with a decay time of ~0.341 ms is detected, with its intensity increasing in regions with Fe2+ concentration close to the maximum one. The line is attributed to the luminescence center arising due to the Fe2+ interaction with a background impurity or defect in ZnSe.
KeywordsZnSe impurity Fe luminescence
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This study was supported by the Russian Foundation for Basic Research (project no. 19-32-70045, sections 2, 3) and the Russian Science Foundation (project no. 17-72-10265, section 4).