Fluorescence intensity ratio for BaHfO₃:Eu³⁺ temperature sensor

Area of Science:

• Materials Science
• Optical Physics
• Solid-State Chemistry

Background:

• Development of advanced optical temperature sensors is crucial for various applications.
• Luminescent materials offer unique properties for non-contact thermometry.
• Europium-doped materials are known for their distinct emission characteristics.

Purpose of the Study:

• To develop and characterize a novel optical temperature sensor.
• To investigate the luminescent properties of europium-doped barium hafnate as a function of temperature.
• To evaluate the sensor's performance in the physiological temperature range.

Main Methods:

• Utilizing 395 nm ultraviolet radiation to excite the europium-doped barium hafnate matrix.
• Performing luminescent analysis across a temperature range of 289.7 K to 323.8 K.
• Analyzing emission spectra to determine temperature-dependent intensity variations.

Main Results:

• Significant variations in luminescent intensity were observed across all transitions with temperature changes.
• A relative sensitivity of 1574.3/T² was achieved.
• The ⁵D₀ -> ⁷F₂ transition exhibited superior temperature resolution of 1.1 × 10² K.

Conclusions:

• Europium-doped barium hafnate is a promising material for optical temperature sensing.
• The developed sensor shows high sensitivity and resolution within the physiological temperature range.
• Further research can explore broader applications and optimization of the sensor's performance.