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This article is cited in 4 scientific papers (total in 4 papers)
Optical properties
Energy transfer from Ce$^{3+}$ to Tb$^{3+}$ in yttrium and gadolinium orthoborates obtained by hydrothermal synthesis
S. Z. Shmurak, V. V. Kedrov, A. P. Kiselev, T. N. Fursova, O. G. Rybchenko Institute of Solid State Physics, Russian Academy of Sciences, Chernogolovka, Moscow region
Abstract:
We studied the structure, IR absorption spectra, the spectral characteristics of photoluminescence and morphology of cerium- and terbium-doped orthoborates of gadolinium and yttrium obtained by hydrothermal synthesis at 200$^{\circ}$C, as well as solid solutions of orthoborates on the basis of yttrium, gadolinium, and lutetium with composition RECe$_{0.01}$Tb$_{0.1}$BO$_{3}$ (RE = Lu$_{0.5}$Gd$_{0.39}$, Lu$_{0.5}$Y$_{0.39}$, and Y$_{0.5}$Gd$_{0.39}$). The X-ray diffraction spectrum of yttrium orthoborate Y$_{1-x-y}$Ce$_{x}$Tb$_{y}$BO$_{3}$ is described by a hexagonal lattice with space group $P6_3/m$, which, after annealing at 970$^{\circ}$C, transforms into a monoclinic lattice with space group $C2/c$. High-temperature annealing of the studied orthoborates leads to a multiple, more than two orders of magnitude, increase in the luminescence intensity of Tb$^{3+}$ ions when the samples are excited in the absorption band of cerium ions. This effect is the result of a significant increase in the concentration of Ce$^{3+}$ ions in the orthoborates at high temperatures. It is shown that the luminescence of terbium ions is due to energy transfer from Ce$^{3+}$ to Tb$^{3+}$, which proceeds with high efficiency ($\sim$85%) by the mechanism of dipole-dipole interaction between cerium and terbium.
Received: 05.07.2018
Citation:
S. Z. Shmurak, V. V. Kedrov, A. P. Kiselev, T. N. Fursova, O. G. Rybchenko, “Energy transfer from Ce$^{3+}$ to Tb$^{3+}$ in yttrium and gadolinium orthoborates obtained by hydrothermal synthesis”, Fizika Tverdogo Tela, 61:1 (2019), 123–136; Phys. Solid State, 60:12 (2018), 2579–2592
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https://www.mathnet.ru/eng/ftt8952 https://www.mathnet.ru/eng/ftt/v61/i1/p123
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