A new diphosphate Ba₂LiGa(P₂O₇)₂: synthesis, crystal structure and Eu³⁺-activated fluorescence performance

Area of Science:

• Materials Science
• Solid State Chemistry
• Photophysics

Background:

• Developing novel luminescent materials is crucial for advancements in optoelectronics.
• Diphosphate compounds offer unique structural and electronic properties for luminescence applications.

Purpose of the Study:

• To synthesize and characterize a new diphosphate compound, Ba2LiGa(P2O7)2 (BLGP).
• To investigate the luminescent properties of Eu3+-doped BLGP as a potential phosphor host material.

Main Methods:

• High-temperature flux method for material synthesis.
• Photoluminescence spectroscopy to analyze emission spectra and quantum efficiency.
• Thermal quenching studies to evaluate temperature stability.

Main Results:

• Ba2LiGa(P2O7)2 (BLGP) was successfully synthesized, featuring an anionic chain structure.
• BLGP:Eu3+ phosphors exhibit bright orange emission centered at 595 nm upon 394 nm excitation.
• Optimal Eu3+ doping concentration is 0.20, yielding an internal quantum efficiency of 67% and retaining 50% intensity at 450 K.

Conclusions:

• Ba2LiGa(P2O7)2 (BLGP) is identified as a promising luminescent host material for Eu3+ activators.
• The material demonstrates good photoluminescence performance and reasonable thermal stability.
• This discovery contributes to the search for new phosphors for optoelectronic devices.