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Luminescent properties of Pb2+- and Mn2+-activated CdI2 crystals

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Abstract

The luminescent properties of CdI2, CdI2:Pb2+, CdI2:Mn2+, and CdI2:Pb2+,Mn2+) crystals have been studied at temperatures from 85 to 295 K under optical and x-ray excitation. Analysis of new and earlier spectroscopic data suggests that the 560-nm luminescence of CdI2:Pb2+ and CdI2:(Pb2+,Mn2+) crystals under excitation on the long-wavelength component of the A absorption band of Pb2+ centers is due to Pb2+-bound anion excitons. The 640-to 660-nm emission of these crystals is attributable to α centers. The manganese luminescence in the codoped material originates from both intracenter Mn2+ excitations and a sensitized process due to energy transfer from the host and Pb2+-related centers. The mechanisms of recombination and energy transfer processes in cadmium iodide crystals codoped with Pb2+ and Mn2+ are discussed.

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Authors and Affiliations

  1. Franko National University, Universitetskaya ul. 1, Lviv, 79000, Ukraine

    S. S. Novosad, I. S. Novosad, I. P. Pashuk & L. V. Kostyk

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  1. S. S. Novosad
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  4. L. V. Kostyk
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Correspondence to S. S. Novosad.

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Original Russian Text © S.S. Novosad, I.S. Novosad, I.P. Pashuk, L.V. Kostyk, 2007, published in Neorganicheskie Materialy, 2007, Vol. 43, No. 8, pp. 981–987.

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Novosad, S.S., Novosad, I.S., Pashuk, I.P. et al. Luminescent properties of Pb2+- and Mn2+-activated CdI2 crystals. Inorg Mater 43, 878–884 (2007). https://doi.org/10.1134/S0020168507080110

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  • DOI: https://doi.org/10.1134/S0020168507080110

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