The emission rise time of BaY2ZnO5:Eu3+ for non-contact luminescence thermometry

Lanthanide-based luminescence thermometry, superior to conventional invasive thermometers, has evoked considerable interest in the field of temperature evaluation for practical applications. Herein, the emission rise time of the D-5(0) level in Eu3+ doped BaY2ZnO5 phosphor was verified to be temperature dependent in a wide range from 330 K to 510 K with a high sensitivity. It exhibited a tremendous decrease with temperature elevating, varying from 207 mu s at 330 K to 16 mu s at 510 K, and the absolute sensitivity was about -1.1 mu s K-1, while the highest relative sensitivity could reach 2.2% K-1 at 490 K. Furthermore, the detailed mechanism was carefully discussed with the experimental data, and this strong temperature dependence was explained in terms of thermal quenching. These results indicate that the accurate temperature evaluation can be realized by singly monitoring the emission rise time of the D-5(0) state, and BaY2ZnO5: Eu3+ phosphor has the specific advantage of being applicable in luminescence thermometry. (C) 2015 Elsevier B.V. All rights reserved.