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

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Published on: December 5, 2025

Eu(2+) luminescence in SrCaP2 O7 pyrophosphate phosphor.

R L Kohale¹, S J Dhoble

¹Department of Physics, R.T.M. Nagpur University, Nagpur-440033, India.

Luminescence : the Journal of Biological and Chemical Luminescence

|September 25, 2012

Summary

New strontium calcium pyrophosphate phosphors activated with Europium (Eu2+) show strong blue light emission. These materials are effectively excited by mercury-free light sources, making them ideal for solid-state lighting applications.

Keywords:

Photoluminescence XRD phosphor pyrophosphate

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Area of Science:

Materials Science
Solid-State Chemistry
Luminescence

Background:

Developing efficient phosphors is crucial for advancements in lighting technology.
Europium (Eu2+) activated materials are known for their luminescent properties.
The demand for mercury-free lighting solutions is increasing.

Purpose of the Study:

To synthesize and characterize novel SrCaP2O7 pyrophosphate phosphors doped with Eu2+.
To investigate the photoluminescence properties of these phosphors for potential lighting applications.
To evaluate their suitability for mercury-free excitation sources.

Main Methods:

Modified solid-state reaction method for phosphor synthesis.
X-ray diffraction (XRD) for structural analysis.
Photoluminescence (PL) spectroscopy for optical property evaluation.
Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM) for material characterization.

Main Results:

Successfully synthesized Eu2+ activated SrCaP2O7 pyrophosphate phosphors.
XRD confirmed the formation of the pyrophosphate structure.
Photoluminescence studies revealed strong blue emission centered at 427 nm.
Excitation spectra indicated efficient absorption under mercury-free excitation at 330 nm, suitable for solid-state lighting.

Conclusions:

The synthesized SrCaP2O7:Eu2+ phosphors exhibit excellent blue luminescence.
These phosphors are promising candidates for efficient and environmentally friendly blue-emitting solid-state lighting.
The results support the development of novel phosphors for next-generation lighting technologies.