Highly Sensitive Dual Self‐Referencing Temperature Readout from the Mn4+/Ho3+ Binary Luminescence Thermometry Probe

Abstract The binary luminescence thermometry probe is prepared from Y 2 O 3 :Ho 3+ and Mg 2 TiO 4 :Mn 4+ powders. This probe facilitates self‐referencing temperature readouts with excellent repeatability from both emission intensity ratio and excited state lifetimes. The ratio of intensities of Mn 4+ deep red emission from 2 E, 4 T 2 → 4 A 2 electronic transitions, and Ho 3+ green emission from 5 F 4 , 5 S 2 → 5 I 8 electronic transitions provides temperature measurements over the room temperature to 100 °C temperature range with a superior relative sensitivity of 4.6% °C −1 and temperature resolution of 0.1 °C. Over the same temperature range, the temperature readout from the Mn 4+ emission lifetime offers measurements with relative sensitivity better than 0.5% °C −1 and better than 0.2 °C in resolution.