Luminescence thermometry with Eu3+ doped GdAlO3

• Published in: Journal of luminescence Vol. 170; pp. 467 - 471
• Main Authors: Lojpur, Vesna, Ćulubrk, Sanja, Medić, Mina, Dramicanin, Miroslav
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.02.2016
• Subjects: GdAlO3; Luminescence; Thermometry; GdAlO3; Thermometry; Luminescence
• ISSN: 0022-2313; 1872-7883
• DOI: 10.1016/j.jlumin.2015.06.032

Eu3+ doped GdAlO3 powder synthesized by solid state reaction was investigated for аpplication in luminescence thermometry. Phase composition of material was confirmed by X-ray powder diffraction analysis. The photoluminescence emission spectra were collected under excitation of 399nm, while elevating the temperature of the sample from the room temperature to 793K. Emissions from 5D1→7F1 and 5D0→7F2 characteristic transitions of Eu3+ ions are selected for the temperature-dependence study using the fluorescence intensity ratio method. Emission decay curves measured at the strongest emission peak centered at 614nm were recorded in a same temperature range. Data analysis showed that thermometry by fluorescence intensity ratio method can be used over the temperature region 293–793K with the maximal relative sensitivity of 2.96%K−1 (at 293K). Temporal dependence of emission (lifetime) provides temperature sensing from 620 to 793K with the maximal relative sensitivity of 2.28%K−1. •GdAlO3: 4at% of Eu3+ can be used for luminescence thermometry in the 293–793K range.•Combined FIR and lifetime thermometry provide >0.5%K−1 relative sensitivity.•Temperature dependence of lifetime is well described energy gap law model.