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Cr3+-doped Ga2O3 crystals with a corundum structure were synthesized under high temperature and high pressure, and their excitation as well as fluorescence properties were evaluated. The crystals were green under white light illumination but deep red when exposed to ultraviolet light. This is mainly attributable to R1 and R2 fluorescence spectra caused by the Cr3+ transition. The pressure-dependence of their fluorescence spectra is comparable with ruby (Al2O3:Cr3+), which is currently often used as a pressure scale. The excitation spectrum was shifted to the long-wavelength side compared with ruby, which enables excitation with long-wavelength lasers, even if the pressure effect is considered. In addition, the R1 and R2 peaks were well-separated with increasing pressure, which might have advantages over the ruby scale.

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  This document is the Accepted Manuscript version of a Published Work that appeared in final form in Inorganic Chemistry , copyright © 2024 American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.inorgchem.3c04028

Keyword: fluorescence , corundum, doping, gallium oxides, pressure scale

Date published: 2024-02-05

Publisher: American Chemical Society (ACS)

Journal:

• INORGANIC CHEMISTRY (ISSN: 00201669) vol. 63 issue. 5 p. 2695-2700

Funding:

• MEXT 19H05790
• JSPS 23K17711

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.4406

First published URL: https://doi.org/10.1021/acs.inorgchem.3c04028

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Updated at: 2025-01-22 12:30:22 +0900

Published on MDR: 2025-01-22 12:30:23 +0900