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

The binary luminescence thermometry probe is prepared from Y2O3:Ho3+ and Mg2TiO4:Mn4+ 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 Mn4+ deep red emission from E-2, T-4(2)->(4)A(2) electronic transitions, and Ho3+ green emission from F-5(4),S-5(2)-> I-5(8) electronic transitions provides temperature measurements over the room temperature to 100 degrees C temperature range with a superior relative sensitivity of 4.6% degrees C-1 and temperature resolution of 0.1 degrees C. Over the same temperature range, the temperature readout from the Mn4+ emission lifetime offers measurements with relative sensitivity better than 0.5% degrees C-1 and better than 0.2 degrees C in resolution.