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Luminescence of Bismuth‐Activated Ceramics of Yttrium and Scandium Oxides

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Abstract

The luminescence spectra of Y2O3:Bi and Sc2O3:Bi ceramics have been investigated. The spectra have been resolved into elementary components by the Alentsev–Fock method. It has been established that the luminescence is attributed to emission centers of three types, two of which are due to the replacement of Y3+ (or Sc3+) by Bi3+ at the nodes of the crystal lattice of Y2O3 (or Sc2O3) with the point symmetry C 2 and C 3i . The emission center Bi3+ in the position C3i leads to the appearance of blue luminescence with maxima at 3.03 eV for Y2O3:Bi and at 3.05 eV for Sc2O3:Bi; this luminescence is attributed to the transition 3 P 1–1 S 0. The emission center Bi3+ in the position C 2 initiates green luminescence (which is also related to the 3 P 1–1 S 0 transition in Bi3+) with a maximum in the region of 2.40 eV in Y2O3:Bi and in the region of 2.46 eV in Sc2O3:Bi. The red luminescence band with maxima at 1.85 eV in Y2O3:Bi and at 1.95 eV in Sc2O3:Bi is related to the presence of structural defects.

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  1. I. Franko L'vov National University, 50 Dragomanov Str., L'vov, 79005, Ukraine

    O. M. Bordun

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  1. O. M. Bordun
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Bordun, O.M. Luminescence of Bismuth‐Activated Ceramics of Yttrium and Scandium Oxides. Journal of Applied Spectroscopy 69, 67–71 (2002). https://doi.org/10.1023/A:1015311725546

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