Temperature-sensing behavior of Eu:BaB4O7 nanocrystals

Nanoscale Eu:BaB4O7 crystals were synthesized in a barium borate glass host, and the temperature-sensing behavior of these crystals was demonstrated over the temperature range of 10–673 K using fluorescence intensity ratio and time-resolved photoluminescence techniques. It was concluded that temperature measurement based on rise time variation is sensitive in the low temperature region (<250 K), while decay time variation is found to be sensitive in the high temperature region (>250 K).