Abstract
We have prepared cubic boron nitride samples doped with europium and codoped with europium and chromium. Their red photoluminescence is due to Eu3+ and Eu3+-Cr3+ electronic transitions involving Eu3+ in a noncentrosymmetric position in a field of cubic symmetry. Chromium is shown to have a positive effect on the incorporation of Eu3+ into lattice sites of c-BN. The photoluminescence spectrum of polycrystalline c-BN codoped with Eu3+ and Cr3+ is a combination of the spectra of Eu3+ in fields of cubic and monoclinic symmetries, the latter spectrum being blue-shifted relative to the spectrum of Eu3+-doped microcrystalline powder. The c-BN materials prepared in this study can be used as red phosphors and light emitters possessing high thermal stability, radiation hardness, and chemical resistance.
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Original Russian Text © E.M. Shishonok, S.V. Leonchik, J.W. Steeds, 2008, published in Neorganicheskie Materialy, 2008, Vol. 44, No. 5, pp. 565–574.
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Shishonok, E.M., Leonchik, S.V. & Steeds, J.W. Photoluminescence of cubic BN doped with europium and codoped with europium and chromium. Inorg Mater 44, 490–499 (2008). https://doi.org/10.1134/S0020168508050117
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DOI: https://doi.org/10.1134/S0020168508050117