Visual Luminescence Thermometry Enabled by Phase-Transition-Activated Cross Relaxation of Tb 3+ Ions

Key Points

• The study aims to develop visual luminescent thermometers that change color with temperature, enhancing thermal sensitivity.
• Designed phosphors activated by Tb3+ ions to optimize thermal responsiveness.
• Investigated the phase-transition effects on luminescent properties.
• Evaluated thermometric performance under varying temperature conditions.
• Phosphors exhibited clear color changes in response to temperature variations, indicating high sensitivity.
• Luminescent thermometers engineered with Tb3+ ions showed superior performance against standard models.
• Phase-transition mechanisms significantly enhanced thermal sensitivity and response times.