Understanding the power of luminescence ratiometric thermal history indicators driven by phase transitions: the case of Eu3+ doped LaVO4

Finding thermal history phosphors with high sensitivity and a consistent readout is required for reliable thermal history determination with high temperature resolution. This work presents a new thermal history phosphor based on the luminescence of Eu3+ ions in LaVO4 to meet these requirements. As d...

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Published inDalton transactions : an international journal of inorganic chemistry Vol. 52; no. 18; pp. 6077 - 6084
Main Authors Elzbieciak-Piecka, K, Piotrowski, W M, Dramicanin, M D, Marciniak, L
Format Journal Article
LanguageEnglish
Published Cambridge Royal Society of Chemistry 09.05.2023
Subjects
Crystallography
Europium
High temperature
Low temperature
Luminescence
Phase transitions
Phosphors
Sensitivity
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Summary:Finding thermal history phosphors with high sensitivity and a consistent readout is required for reliable thermal history determination with high temperature resolution. This work presents a new thermal history phosphor based on the luminescence of Eu3+ ions in LaVO4 to meet these requirements. As demonstrated, raising the annealing temperature causes a structural phase transition from a low-temperature tetragonal phase to a high-temperature single-stranded phase. The associated change in the local point symmetry of the crystallographic site occupied by Eu3+ ions result in a significant decrease in the emission intensity ratio of the 5D0 → 7F2 band relative to the 5D0 → 7F1 band, which enables the development of the ratiometric thermal history phosphor with the relative sensitivity of 0.38% °C−1 at 800 °C. Its applicative potential for thermal history readout was proved in the proof-of-concept experiment.
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ISSN:1477-9226
1477-9234
DOI:10.1039/d3dt00601h