Investigation of spectroscopic properties of Sm3+ doped phosphate glasses for reddish orange light applications

Samples of phosphate glasses with composition of (40-x) P2O5-40Na2O-20ZnO-xSm2O3, with Sm3+ ion concentration varying from 0.1 to 2.5%, were synthesized using melt quenching technique and characterized by XRays Diffraction, UV-Vis and luminescence spectroscopies. Using Judd-Ofelt analysis, the parameters omega 2, omega 4 and omega 6 of Sm3+ (4f7) were determined. Three transitions of Sm3+: 4G5/2 -> 6H5/2, 6H7/2, 6H9/2 were observed from the luminescence spectra. The radiative (tau r) and the measured (tau mea) lifetimes for 4G5/2 level, were discussed and compared with other works. The quantum efficiency (eta) is found to be higher for x = 0.5 mol % of Sm2O3. The CIE chromaticity coordinates were calculated, and it was found that PSm glasses can be suitable for the development of visible lasers in the orange red spectral region.

Automated summary

In this study, phosphate glass samples were synthesized and characterized, and it was found that PSm glasses with specific Sm3+ ion concentrations have higher quantum efficiency and can be suitable for visible lasers in the orange-red spectral region.