Temperature Variations of Spectra and Images of Photoluminescence from Heavily Cr-Doped Ruby

Photoluminescence (PL) spectra, intensities, and image brightness of 0.1–6.0 at% Cr-doped ruby were investigated across temperatures ranging from 24° to 600°C. PL emissions at λ = 670, 694, 707, and 715 nm were observed in rubies doped with 0.1–1.0 at% Cr. In rubies with higher doping levels of 1.5–...

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Published in:ECS journal of solid state science and technology 2024-06, Vol.13 (6)
Main Authors: Hitomi, Ami, Aizawa, Hiroaki, Katsumata, Toru
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Language:English
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luminescence
luminescence - spectroscopy
phosphors - characterization
sensors
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description Photoluminescence (PL) spectra, intensities, and image brightness of 0.1–6.0 at% Cr-doped ruby were investigated across temperatures ranging from 24° to 600°C. PL emissions at λ = 670, 694, 707, and 715 nm were observed in rubies doped with 0.1–1.0 at% Cr. In rubies with higher doping levels of 1.5–6.0 at% Cr, an additional PL emission at λ = 770 nm was detected. PL intensities at  = 694, 707, 715, and 770 nm decreased with increasing temperatures from 24° to 600°C, while the PL intensity at  = 670 nm showed a similar temperature-dependent decrease. The variation in PL image brightness with temperature, particularly the increase observed from 24° to 200°C, is predominantly influenced by the PL intensity variations at λ = 670 nm. Decay curves and fluorescence lifetimes of PL from ruby with various Cr concentrations were also evaluated at temperatures RT-200°C.
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subjects luminescence
luminescence - spectroscopy
phosphors - characterization
sensors
title Temperature Variations of Spectra and Images of Photoluminescence from Heavily Cr-Doped Ruby
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