Low concentration Sm3+ions loaded zinc sodium borate glasses for solid state lighting devices

Herein, zinc sodium borate glasses containing samarium ions were fabricated using the traditional meltquenching approach and explored using several spectroscopic and structural methods. The XRD data corroborated the host glass specimen's non-crystalline nature. Scanning electron microscopy and the energy dispersive X-ray spectroscopy method were utilized to study the morphological and homogenous attributes. The UV-Vis-NIR wavelengths of absorption showed a total of seventeen distinct Sm3+ ion peaks. The three transitions (4)G(5/2) -> H-6(9/2), H-6(7/2), and H-6(5/2) are evident in the PL data at wavelengths of 644, 597, and 561 nm, respectively, in the red, reddish-orange, and greenish-yellow zones. The luminescence intensity of the investigated glass specimens increases up to 0.4 mol% Sm3+ ion content thereafter reducing because of the nonradiative transfer of energy. The estimated JO intensity parameters exhibit a trend of Omega(2)>Omega(4)>Omega(6). The trend of the assessed radiative parameters also demonstrated that they are sensitive to changes in the glass network. The Futchbauer-Ladenburgh theory was used to compute the emission cross-section of various transitions utilizing the radiative parameters. The 1931 CIE chromaticity coordinates assessments corroborate the reddish-orange luminescence from the fabricated glasses. The outcomes have proven that obtained BNZSmx glasses doped with low concentrations of trivalent samarium ions are well suited for reddish-orange solid-state lighting systems.