Simultaneous Enhancement and Modulation of Upconversion by Thermal Stimulation in Sc2Mo3O12 Crystals

• DOI: 10.1021/acs.jpclett.0c00628
• Publication Date: 2020-03-10T21:25:35Z
• Authors: Hua Zou; Bing Chen; Yifeng Hu; Qiwei Zhang; Xusheng Wang; Feng Wang
• Keywords: Photon Upconversion; Thermometer; Crystal (programming language)

Rational control of photoluminescence against a change in temperature is important for fundamental research and technological applications. Herein, we report an anomalous dependence upconversion luminescence Yb/Ho co-doped Sc2Mo3O12 crystals. By leveraging negative thermal expansion the crystal lattice, energy transfer between lanthanide dopants promoted as increased from 303 to 573 K, resulting ∼5-fold enhancement emission. Meanwhile, emission profile also substantially altered due concurrent quenching selective states, corresponding clear shift color green red. Via correlation red-to-green intensity ratio Ho3+ dopant ions with temperature, ratiometric thermometer constructed maximum sensitivity 2.75% K-1 at 543 K. As crystals are thermally stable nonhygroscopic, our findings highlight general approach highly reversible by ambient air.