Structural Phase Transition and Cooperative Luminescence in K3Yb(PO4)2:Eu3+ for Multimodal Down-shifting and Up-converting Luminescence Thermometry

Key Points

• The aim is to create a universal luminescent thermometer that is both sensitive and versatile across spectral ranges.
• Evaluated K3Yb(PO4)2:Eu3+ for luminescent properties
• Measured temperature response across spectral ranges
• Assessed relative sensitivity at different excitation wavelengths
• Achieved high relative sensitivity in luminescence
• Demonstrated effective multimodal temperature measurements
• Revealed cooperative luminescence behavior during phase transition