Long persistent luminescence in the ultraviolet in Pb(2+)-doped Sr2MgGe2O7 persistent phosphor.

Area of Science:

• Materials Science
• Solid-State Chemistry
• Luminescence

Background:

• Persistent phosphors are crucial for various applications, but extending their emission into the ultraviolet (UV) region remains challenging.
• Existing UV persistent materials often suffer from short decay times or low emission intensity.

Purpose of the Study:

• To develop a novel persistent phosphor with strong emission in the ultraviolet spectral region.
• To investigate the luminescence properties and persistence characteristics of the new material.

Main Methods:

• Synthesis and characterization of a new phosphor material: Sr2MgGe2O7 doped with Pb(2+).
• Measurement of persistent luminescence spectra, decay curves, and photo-stimulated luminescence.
• Evaluation of emission intensity and persistence time after UV excitation.

Main Results:

• The synthesized Sr2MgGe2O7:Pb(2+) phosphor exhibits strong persistent luminescence.
• The emission spectrum peaks at 370 nm, falling within the ultraviolet region.
• A long persistence time exceeding 12 hours was observed, along with photo-stimulated persistent luminescence capability.

Conclusions:

• Sr2MgGe2O7:Pb(2+) is a promising new material for ultraviolet persistent luminescence applications.
• The extended persistence time and UV emission open possibilities for advanced optical and sensing technologies.
• The material's photo-stimulated luminescence adds versatility for potential applications.