Abstract
A novel apatite-based phosphor MgGd4Si3O13[Mg2Gd8(SiO4)6O2]:Ce3+, Mn2+ was designed and successfully synthesized by a solid-state reaction. Based on the different luminescence properties under 298 and 340 nm excitations, its potential application as a dual-excitation luminescent ratiometric thermometer was studied in detail. Under the excitations of 298 and 340 nm, the fluorescent intensity ratio of Ce3+ and Mn2+ is linearly correlated in the temperature range of 303–473 K. The sensitivity showed an opposite trend with the increase of temperature, and the maximum value was 0.95% K–1. These results indicated that MgGd4Si3O13: Ce3+, Mn2+ can be used as an ideal dual-excitation luminescent ratiometric thermometer.
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