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Efficiency of Cr3+ → Cr4+ conversion in YSAG:Cr ceramics

Efficiency of Cr3+ → Cr4+ conversion in YSAG:Cr ceramics

In this study, we investigated the influence of the position and quantitative content of scandium in YSAG:Cr on the efficiency of chromium cation valence conversion. YSAG:Cr ceramic powders were synthesized using the chemical precipitation method. It was determined that the microstructure of ceramic...

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Bibliographic Details
Main Authors: Suprunchuk, V. E., Супрунчук, В. Е., Kravtsov, A. A., Кравцов, А. А., Malyavin, F. F., Малявин, Ф. Ф., Lapin, V. A., Лапин, В. А., Vakalov, D. S., Вакалов, Д. С., Tarala, L. V., Тарала, Л. В., Medyanik, E. V., Медяник, Е. В., Chapura, O. M., Чапура, О. М., Bedrakov, D. P., Бедраков, Д. П., Tarala, V. A., Тарала, В. А.
Format: Статья
Language:English
Published: Elsevier Ltd 2024
Subjects:
Ceramics
Valence conversion
Cr3+
Cr4+
Optical properties
YSAG
Online Access:https://dspace.ncfu.ru/handle/123456789/28980
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Summary:In this study, we investigated the influence of the position and quantitative content of scandium in YSAG:Cr on the efficiency of chromium cation valence conversion. YSAG:Cr ceramic powders were synthesized using the chemical precipitation method. It was determined that the microstructure of ceramics and the luminescent properties of YSAG:Cr4+ depend on the predominant position of scandium, whether it replaces octahedral or dodecahedral positions in the garnet crystal lattice. An increase in Scdod content contributed to a decrease in grain size and a shift of the emission peak of Cr4+ ions towards the short-wavelength region. Conversely, an increase in Scoct content led to an increase in grain size and a shift of the maximum of the luminescent band towards the long-wavelength region. It was found that increasing the quantitative content of scandium in the octahedral position in the garnet structure by up to 50 % enhances the efficiency of the conversion of Cr3+ to Cr4+, while an increase in the proportion of Scdod resulted in a decrease in conversion efficiency.

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