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This article is cited in 3 scientific papers (total in 3 papers)
Optical properties
The peculiarities of the spectral characteristics of different Lu$_{1-x}$RE$_{x}$BO$_{3}$ structural modifications
S. Z. Shmurak, V. V. Kedrov, A. P. Kiselev, T. N. Fursova, I. I. Zver'kova, E. Yu. Postnova Institute of Solid State Physics, Russian Academy of Sciences, Chernogolovka, Moscow region, Russia
Abstract:
The structure, IR absorption and luminescence spectra of the microcrystals of Lu$_{1-x}$RE$_{x}$BO$_{3}$, Lu$_{0.99-x}$Tb$_{x}$Eu$_{0.01}$BO$_{3}$, and Lu$_{0.99-x}$Y$_{x}$Eu$_{0.01}$BO$_{3}$ orthoborates (0 $\le x \le$ 0.25) synthesized at 970$^{\circ}$С were studied. An increase in х leads to a sequential change of the structural state of the orthoborates. At $x\le$ 0.07 – 0.09, the compounds form a solid solution with the calcite structure and microcrystal size of 8 – 20 $\mu$m. Then, they become two-phase: the vaterite phase arises along with the calcite structure. At $x\ge$ 0.2 – 0.25, the entire bulk of a sample has the vaterite structure. A correspondence between the structure and spectral characteristics of these compounds was established. Luminescence spectra were investigated at different wavelengths of exciting light. This allowed obtaining information on the structure of a near-surface layer and the bulk of microcrystals of the investigated samples. It is shown that the vaterite phase arises both in the bulk of large microsrystals (8 – 20 $\mu$m) and in the form of small microsrystals (1 – 2 $\mu$m).
Keywords:
luminophors for light-emitting diodes, rare-earth orthoborates, X-ray phase analysis, IR spectroscopy, luminescence spectra.
Received: 30.04.2021 Revised: 30.04.2021 Accepted: 07.05.2021
Citation:
S. Z. Shmurak, V. V. Kedrov, A. P. Kiselev, T. N. Fursova, I. I. Zver'kova, E. Yu. Postnova, “The peculiarities of the spectral characteristics of different Lu$_{1-x}$RE$_{x}$BO$_{3}$ structural modifications”, Fizika Tverdogo Tela, 63:10 (2021), 1617–1632; Phys. Solid State, 63:12 (2021), 1795–1810
Linking options:
https://www.mathnet.ru/eng/ftt7999 https://www.mathnet.ru/eng/ftt/v63/i10/p1617
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