Neodymium luminescence in chalcogenides of europium-gallium: EuGaS4 and EuGa2Se4
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Add time:08/05/2019 Source:sciencedirect.com
Photoluminescence of chalcogenides of europium-gallium, EuGa2S4 and EuGa2Se4, doped with neodymium is investigated. The positions of Stark levels are determined from the spectra. The symmetry of luminescence centres is shown to be lower than cubic and the existence of nonequivalent centers is established. At 77 K the decay time of luminescence from the excited levels of Nd3+ depends on the spin of the states. That indicates a slow relaxation rate in the crystals under investigation. It is probable that these crystals can be used as effective luminophores.
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