MgGd4Si3O13:Ce3+, Mn2+: A Dual-Excitation Temperature Sensor

A novel apatite-based phosphor MgGd4Si3O13[Mg2Gd8(SiO4)(6)O-2]: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.

Automated summary

A novel apatite-based phosphor MgGd4Si3O13:Ce3+, Mn2+ was successfully synthesized and its potential application as a dual-excitation luminescent ratiometric thermometer was studied. The experiment showed that the fluorescent intensity ratio of Ce3+ and Mn2+ was linearly correlated with temperature in a specific range, indicating its high sensitivity as a thermometer.