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Phase-Dependent Control of Trap Depth and Persistent Luminescence in Strontium Aluminate Phosphors

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Engineering a Reversible Primary Battery Structure in SrZnOS:Eu²⁺,Dy³⁺ for Multi-Modal Red Luminescence.

Xiangyu Zhang¹, Yuanyuan Hu², Chunlong Xu¹

¹College of Science, Chang'an University, Xi'an, Shaanxi 710064, China.

ACS Applied Materials & Interfaces

|July 14, 2026

Summary

Researchers developed a new red phosphor, SrZnOS:Eu²⁺,Dy³⁺, for efficient visible light emission. This material offers tunable multi-modal luminescence, showing promise for advanced displays and secure storage.

Keywords:

Eu2+-activated luminescence doping persistent phosphor photochemical primary cell trap management

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Published on: July 25, 2025

Area of Science:

Materials Science
Solid-State Chemistry
Luminescence

Background:

Developing efficient red phosphors activated by divalent europium (Eu²⁺) under visible light is crucial for photonics, optoelectronics, and white-light-emitting diodes (LEDs).
Existing materials often require ultraviolet (UV) excitation, limiting their application scope and efficiency.

Purpose of the Study:

To rationally design a novel SrZnOS:Eu²⁺,Dy³⁺ phosphor with high-density traps and a double metastable state.
To achieve robust red luminescence under visible light excitation for advanced applications.
To explore multi-modal luminescence properties for potential use in secure information storage and displays.

Main Methods:

Engineered the SrZnOS matrix by constructing a reversible infinitesimal photoelectrochemical layered micro-unit battery structure.
Co-doped the matrix with divalent europium (Eu²⁺) and trivalent dysprosium (Dy³⁺) ions.
Characterized the photoluminescence, persistent luminescence, and stimulated luminescence properties.

Main Results:

Synthesized SrZnOS:Eu²⁺,Dy³⁺ exhibiting intense red photoluminescence at 620 nm under 468 nm visible light excitation.
Achieved emission intensity comparable to commercial UV-excited phosphors.
Demonstrated multi-modal luminescence, including red persistent luminescence and tunable photo/thermo/mechano-stimulated luminescence.

Conclusions:

The engineered SrZnOS:Eu²⁺,Dy³⁺ phosphor is a promising candidate for visible light-driven red emission applications.
The material's multi-modal luminescence properties open avenues for secure information storage and advanced display technologies.
Photoelectrochemical cell engineering provides a viable strategy for designing functional oxide-based luminescent materials.