Realizing Multidimensional UV/X-Ray Visualization Detection via Ionic Site Migration

Area of Science:

• Materials Science
• Optoelectronics
• Radiation Detection

Background:

• Current multimode optical detection methods using fluorescent materials are limited by composite luminescence from multiple rare-earth ions.
• Developing advanced optical materials is crucial for identifying hidden threats and providing early risk warnings.

Purpose of the Study:

• To develop a novel material for visual detection of both UV and X-ray radiation.
• To overcome the limitations of existing multimode optical detection techniques.

Main Methods:

• Introducing manganese ions (Mn²⁺) into lithium aluminate (LiAlO₂) to create a luminescent material.
• Investigating the photoluminescence (PL) and long-persistent luminescence (LPL) properties of the material under UV and X-ray irradiation.
• Analyzing the temperature-dependent luminescence characteristics, specifically the color shift.

Main Results:

• The LiAlO₂:Mn²⁺ material exhibits yellow photoluminescence and green long-persistent luminescence.
• X-ray irradiation results in yellow long-persistent luminescence.
• A distinct yellow-to-green color shift in LPL is observed above 398 K after X-ray exposure.

Conclusions:

• The integration of photoluminescence and long-persistent luminescence in LiAlO₂:Mn²⁺ offers a new approach for multimode optical detection.
• This material demonstrates potential for visual detection of UV and X-ray radiation with temperature-dependent color discrimination.
• The findings establish a novel paradigm for designing advanced optical visualization detection materials.