- PII
- 10.31857/S0044457X23600470-1
- DOI
- 10.31857/S0044457X23600470
- Publication type
- Status
- Published
- Authors
- Volume/ Edition
- Volume 68 / Issue number 8
- Pages
- 1030-1041
- Abstract
- Ceramic samples of Y3MgGa3SiO12, Y3MgGa2AlSiO12, and Y3MgGaAl2SiO12 multicomponent garnets doped with 0.2 at % Cr3+ have been obtained by high-temperature solid-state synthesis. In the luminescence spectra of the synthesized garnet samples, overlapping broadband luminescence is observed in the far red spectral region caused by the 4T2 → 4A2 transition in Cr3+ ions, and a narrow band is observed in the range of 690–700 nm, corresponding to the zero-phonon line of the 2Е → 4A2 transition in Cr3+. The narrow-band and broad-band parts of the spectra are attributed to radiation from two different types of chromium centers, which are in octahedral coordination with different distortion degrees and strength of the crystal field. This results from the presence of two ions at the octahedral position of these garnets, which differ significantly in crystal chemical properties, namely, Mg2+ and Ga3+ (Al3+). The studied phosphors, which have broadband luminescence in the phytoactive far red region of the spectrum, have the potential for use in greenhouse LED lamps.
- Keywords
- керамика люминесценция гранат ионы хрома красный люминофор
- Date of publication
- 01.08.2023
- Year of publication
- 2023
- Number of purchasers
- 0
- Views
- 37
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