Study of the impurity photoconductivity and luminescence in ZnSe:Ni crystals in the visible spectral region |
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Authors: | Yu. A. Nitsuk Yu. F. Vaksman V. V. Yatsun |
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Affiliation: | 1. Mechnikov National University, Odessa, 65026, Ukraine
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Abstract: | The photoconductivity and photoluminescence spectra of ZnSe:Ni crystals in the visible spectral region are studied. It is established that the high-temperature impurity photoconductivity of ZnSe:Ni crystals is controlled by the optical transitions of electrons from the ground state 3 T 1(F) to high-energy excited states, with subsequent thermally activated transitions of electrons to the conduction band. A photoconductivity band associated with the photoionization of Ni impurities is revealed. The intracenter luminescence of ZnSe:Ni crystals is efficiently excited with light corresponding to the intrinsic absorption region of Ni2+ ions. |
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