Abstract:
Luminescence and thermally stimulated luminescence (TL) of BeO: Mg crystals are studied at $T$ = 6–380 K. The TL glow curves and the spectra of luminescence (1.2–6.5 eV), luminescence excitation, and reflection (3.7–20 eV) are obtained. It is found that the introduction of an isovalent magnesium impurity into BeO leads to the appearance of three new broad luminescence bands at 6.2–6.3, 4.3–4.4, and 1.9–2.6 eV. The first two are attributed to the radiative annihilation of a relaxed near-impurity (Mg) exciton, the excited state of which is formed as a result of energy transfer by free excitons. The impurity VUV and UV bands are compared with those for the intrinsic luminescence of BeO caused by the radiative annihilation of self-trapped excitons (STE) of two kinds: the band at 6.2–6.3 eV of BeO: Mg is compared with the band at 6.7 eV (STE$_1$) of BeO, and the band at 4.3–4.4 eV is compared with the band at 4.9 eV (STE$_2$) of BeO. In the visible region, the luminescence spectrum is due to a superposition of intracenter transitions in an impurity complex including a magnesium ion. The manifestation of X-ray-induced luminescence bands at $T$ = 6 K in BeO: Mg indicates their excitation during band-to-band transitions and in recombination processes. The energy characteristics of the impurity states in BeO: Mg are determined; the effect of the isovalent impurity on the fluctuation rearrangement of the BeO: Mg structure in the thermal transformation region of STE$_1$$\to$ STE$_2$ is revealed.
Citation:
I. N. Ogorodnikov, M. D. Petrenko, V. Yu. Ivanov, “Low-temperature luminescence and thermally stimulated luminescence of BeO: Mg single crystals”, Fizika Tverdogo Tela, 60:1 (2018), 132–144; Phys. Solid State, 60:1 (2018), 134–146
\Bibitem{OgoPetIva18}
\by I.~N.~Ogorodnikov, M.~D.~Petrenko, V.~Yu.~Ivanov
\paper Low-temperature luminescence and thermally stimulated luminescence of BeO: Mg single crystals
\jour Fizika Tverdogo Tela
\yr 2018
\vol 60
\issue 1
\pages 132--144
\mathnet{http://mi.mathnet.ru/ftt9339}
\crossref{https://doi.org/10.21883/FTT.2018.01.45300.171}
\elib{https://elibrary.ru/item.asp?id=32737390}
\transl
\jour Phys. Solid State
\yr 2018
\vol 60
\issue 1
\pages 134--146
\crossref{https://doi.org/10.1134/S106378341801016X}
Linking options:
https://www.mathnet.ru/eng/ftt9339
https://www.mathnet.ru/eng/ftt/v60/i1/p132
This publication is cited in the following 4 articles:
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V. Altunal, M. Jain, S. Hayat, V. Guckan, Z. Yegingil, “Development of BeO:Na,Yb,Dy ceramics for optically stimulated luminescence dosimetry”, Radiation Measurements, 158 (2022), 106852
V. Altunal, V. Guckan, A. Ozdemir, K. Kurt, A. Ekicibil, Z. Yegingil, “Investigation of luminescence properties of BeO ceramics doped with metals for medical dosimetry”, Optical Materials, 108 (2020), 110436
S. V. Zvonarev, N. O. Smirnov, “Luminescence quenching in magnesium-doped alumina ceramics”, Phys. Solid State, 61:5 (2019), 835–839