2024
DOI: 10.1364/ome.525654
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Upconversion luminescence and temperature sensing properties of Tm3+, Yb3+, and Ho3+ doped 12CaO·7Al2O3 single crystals

Yunfei Qu

Abstract: Tm3+, Yb3+, and Ho3+ doped 12CaO·7Al2O3 (C12A7) single crystal exhibiting white light emission has been successfully prepared by the Czochralski method. Under 980 nm excitation, the emission peaks were observed at 475 nm, 550 nm, 653 nm, and 660 nm. As the temperature increased from 403 K to 623 K, the upconversion luminescence color of the Tm3+/Yb3+/Ho3+/C12A7 crystal changed from white to green and exhibited large temperature dependence. In the temperature range of 403K-623 K, the absolute sensitivity (SA) v… Show more

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