Photoluminescence and quenching study of the Sm3+-doped LiBaPO4 phosphor

Sm3+-doped LiBaPO4 phosphors have been successfully synthesized by solution combustion method. As prepared samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), Fourier-transform infrared, and photoluminescence spectroscopy. Phase formation was confirmed by comparing the XRD pattern of the samples with available JCPDS (No. 14-0270) data. SEM images of the phosphor revealed its porous morphology. XPS study revealed the successful doping of the activator at the host site. Photoluminescence spectra of LiBaPO4:Sm3+ exhibit four characteristic emission peaks due to (4)G(5/2) to H-6(J) (J = 5/2, 7/2, 9/2, and 11/2) at excitation wavelength of 402 nm. The Dexter's theory revealed that the concentration quenching behavior has occurred due to the dipole-dipole interaction between the Sm3+-Sm3+ ions in the phosphors. The calculated Commission Internationale de I'Elcairage color co-ordinates reveal its deep orange-reddish emission which indicates its utility in lighting and photonic applications.

Automated summary

Sm3+-doped LiBaPO4 phosphors were successfully synthesized by solution combustion method, characterized by various techniques such as XRD, SEM, XPS, FTIR, and photoluminescence spectroscopy. The phosphors exhibit porous morphology, successful doping of the activator, and unique emission peaks at different excitation wavelengths indicating their potential utility in lighting and photonic applications.