Spectroscopic investigation by incorporation of charge compensator ions in CaBaSiO4: Dy3+ phosphors for solid-state lighting applications

In this research paper, we present a study on the preparation and spectroscopic properties of Dy3+-doped calcium barium ortho-silicate (CaBaSiO4) phosphor. The phosphors were synthesized using the solid-state reaction route. The obtained powders underwent characterization through X-ray diffraction (XRD) and Furrier transform infrared (FTIR), confirming phase purity and the presence of functional groups, respectively. Energy-dispersive X-ray (EDX) reveals the elemental composition of the material under examination. The spectroscopic properties of Dy3+ in CaBaSiO4 phosphor were investigated through emission and excitation spectra analysis. The emission spectra exhibit two peaks in the blue region at 482 nm and in the yellow region at 574 nm under UV excitation with a wavelength of 349 nm. Both emission peaks are attributed to the 4F9/2 → 6H15/2 and 4F9/2 → 6H13/2 characteristic transitions of the Dy3+ ion. The critical distance was calculated using the Blasse equation. Monovalent ions were added to the host as charge compensator ions to enhance the luminescence intensity. The CIE chromaticity coordinates were determined from the emission spectra, affirming that the CaBaSiO4 phosphor is a suitable candidate for solid-state lighting applications, particularly in w–LEDs.