Optical and spectral studies on pure and europium doped olgite type Na(Sr,Ba)PO4 ceramics

• Eu2+ doped olgite ceramics samples were synthesized by a solid state reaction.
• SEM micrographs exhibits well dispersed and polyhedra morphological structure.
• EPR spectrum exhibits hyperfine structure of 151Eu2+ and 153Eu2+ isotopes.

Europium ion doped olgite type Na(Sr,Ba)PO4 ceramics, a new generation of light emitting bulb, was prepared by a high temperature solid-state reaction method. The synthesized materials were subjected to various characterizations such as X-ray powder diffraction, Scanning electron microscopy and FT-IR spectra measurements. The EPR spectrum of the sample exhibits a well-resolved hyperfine structure of 151Eu2+ and 153Eu2+ isotopes and the g value has been calculated. Fluorescence spectra revealed that europium ions were present in divalent as well as in the trivalent oxidation states. The critical distance for energy transfer between Eu2+ and Eu2+ ion is calculated as 20 Å, which is in good agreement with that of experimental data. The FTIR analysis reveals all the vibrations of PO43− ions.

Schematics of 5d excited stark level of Eu2+ doped olgite.Figure optionsDownload as PowerPoint slide