Physics of the Solid State
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Spectral characteristics and energy transfer Ce3+->Tb3+->Eu3+ in LuBO3(Ce, Tb, Eu) compound
Shmurak S. Z. 1, Kedrov V. V. 1, Kiselev A. P. 1, Fursova T. N. 1, Zver'kova I. I. 1
1Osipyan Institute of Solid State Physics RAS, Chernogolovka, Russia
Email: shmurak@issp.ac.ru

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The structure, IR, luminescence, and luminescence excitation spectra of Ce3+, Tb3+, and Eu3+ ions in Lu1-2xCexEuxBO3 and Lu0.91-2xCexTb0.09EuxBO3 solid solutions were studied. The minimum "threshold" distance between Ce3+ and Eu3+ ions was estimated, at which there is no charge transfer between these ions, leading to the quenching of Ce3+ and Eu3+ luminescence. It is shown that in Lu0.91-2xCexTb0.09EuxBO3 compounds, the range of Ce and Eu concentrations of 0.2-0.25 at.% is optimal for obtaining the maximum luminous intensity of this compound. Keywords: phosphors for LEDs, rare earth orthoborates, X-ray diffraction analysis, IR spectroscopy, luminescence spectra.
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