Energy Transfer from Ce{sup 3+} to Tb{sup 3+} in Yttrium and Gadolinium Orthoborates Obtained by Hydrothermal Synthesis

Journal Article · Sat Dec 15 00:00:00 EST 2018 · Physics of the Solid State

DOI:https://doi.org/10.1134/S1063783419010244· OSTI ID:22923137

Kedrov, V. V.; Kiselev, A. P.; Fursova, T. N.; Rybchenko, O. G. ^[1]

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1. Institute of Solid State Physics, Russian Academy of Sciences (Russian Federation)

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°C, as well as solid solutions of orthoborates on the basis of yttrium, gadolinium, and lutetium with composition RECe{sub 0.01}Tb{sub 0.1}BO{sub 3} (RE = Lu{sub 0.5}Gd{sub 0.39}, Lu{sub 0.5}Y{sub 0.39}, and Y{sub 0.5}Gd{sub 0.39}). The X-ray diffraction spectrum of yttrium orthoborate Y{sub 1 –} {sub x} {sub –} {sub y}Ce{sub x}Tb{sub y}BO{sub 3} is described by a hexagonal lattice with space group P6{sub 3}/m, which, after annealing at 970°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{sup 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{sup 3+} ions in the orthoborates at high temperatures. It is shown that the luminescence of terbium ions is due to energy transfer from Ce{sup 3+} to Tb{sup 3+}, which proceeds with high efficiency (∼85%) by the mechanism of dipole-dipole interaction between cerium and terbium.

• OSTI ID: 22923137
• Journal Information: Physics of the Solid State, Vol. 60, Issue 12; Other Information: Copyright (c) 2018 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7834
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION SPECTRA
ANNEALING
BORATES
CERIUM IONS
DIPOLES
DOPED MATERIALS
ENERGY TRANSFER
GADOLINIUM COMPOUNDS
HEXAGONAL LATTICES
HYDROTHERMAL SYNTHESIS
INFRARED SPECTRA
LUTETIUM
MONOCLINIC LATTICES
MORPHOLOGY
PHOTOLUMINESCENCE
SOLID SOLUTIONS
SPACE GROUPS
TERBIUM IONS
X-RAY DIFFRACTION
YTTRIUM COMPOUNDS