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Updated: Jun 13, 2026
06:16
Phase-Dependent Control of Trap Depth and Persistent Luminescence in Strontium Aluminate Phosphors
Published on: December 5, 2025
Composition-Modulated Strontium Aluminate Phosphors with Continuously Tunable Visible Emission for Advanced Display,
Jingwen Yang1, Guijian Guan1,2
1Institute of Molecular Plus, Tianjin University, Tianjin 300072, China.
Materials (Basel, Switzerland)
|June 12, 2026
Summary
Researchers developed a single phosphor material that tunes color across the visible spectrum. This multicolor-tunable phosphor offers applications in displays, anti-counterfeiting, and temperature sensing.
Area of Science:
- Materials Science
- Solid-State Chemistry
- Luminescence
Background:
- Developing single-phase phosphors with tunable emission is crucial for advanced optical applications.
- Existing phosphors often lack the ability to cover the entire visible spectrum or integrate multiple functionalities.
Purpose of the Study:
- To demonstrate a single phosphor material system for continuous color tuning across the visible spectrum.
- To integrate multiple luminescent functionalities within this phosphor system.
- To explore the structure-property relationships for multicolor emission and functional applications.
Main Methods:
- Synthesis of europium-doped strontium aluminate phosphors with varying Al/Sr ratios.
- Systematic investigation of photoluminescence mechanisms, correlating crystal phase evolution with europium ion site occupancy.
- Evaluation of functional properties including optical display, anti-counterfeiting, luminescence thermometry, and photothermal conversion.
Main Results:
- Achieved continuous color tuning from red to blue by adjusting the Al/Sr ratio.
- Demonstrated a phosphor with 66.2% absolute quantum yield, functioning as an optical thermometer (0.27% K-1 sensitivity).
- Showcased efficient photothermal conversion (~72.8 °C) at a specific Al/Sr ratio under laser irradiation.
Conclusions:
- A facile composition-regulation strategy enables the design of multicolor-tunable, multifunctional phosphors.
- The developed phosphors show significant promise for optical displays, anti-counterfeiting, luminescence thermometry, and photothermal conversion applications.
