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

• The luminescence thermometry based on rise time is a reliable method.
• The rise time of the 5D0 state is temperature dependent in range of 330–510 K.
• The highest relative sensitivity could reach 2.2% K−1 at 490 K.
• BaY2ZnO5:Eu3+ has advantage of being applicable in 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 5D0 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 μs at 330 K to 16 μs at 510 K, and the absolute sensitivity was about −1.1 μs 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 5D0 state, and BaY2ZnO5:Eu3+ phosphor has the specific advantage of being applicable in luminescence thermometry.