In Situ Synthesis of β-Na1.5Y1.5F6: Er3+ Crystals in Oxyfluoride Silicate Glass for Temperature Sensors and Their Spectral Conversion and Optical Thermometry Analysis

Transparent oxyfluoride glass-ceramics (GCs) with embedded β-Na1.5Y1.5F6 crystals doped with Er3+ ions were fabricated by a melt-quenching method with subsequent heat-treatment. The structural characterizations and spectroscopic techniques were performed to verify the precipitation of β-Na1.5Y1.5F6...

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Published inMolecules (Basel, Switzerland) Vol. 26; no. 22; p. 6901
Main Authors Dagupati, Rajesh, Klement, Robert, Rajavaram, Ramaraghavulu, Velázquez, José J., Galusek, Dušan
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 16.11.2021
MDPI
Subjects
Ceramics
Crystals
down-conversion
Energy
Energy levels
Fluorides
glass
Glass ceramics
glass-ceramic
Heat treatment
optical thermometry
Oxyfluorides
Sensors
Temperature dependence
Temperature sensors
Thermometry
up-conversion
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Summary:Transparent oxyfluoride glass-ceramics (GCs) with embedded β-Na1.5Y1.5F6 crystals doped with Er3+ ions were fabricated by a melt-quenching method with subsequent heat-treatment. The structural characterizations and spectroscopic techniques were performed to verify the precipitation of β-Na1.5Y1.5F6 crystals and partition of the Er3+ dopant into the crystals. Bright green up-conversion (UC) emission was achieved in Er3+-doped glass-ceramic (Er-GC). Furthermore, the temperature-dependent visible UC behavior based on thermally coupled energy levels (TCLs) and non-thermally coupled energy levels (NTCLs) was also examined in the temperature range 298 k to 823 K with maximum relative sensitivity (Sr) of 1.1% K−1 at 298 K for TCLs in Er-G and Er-GC samples.
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ISSN:1420-3049
1420-3049
DOI:10.3390/molecules26226901