Luminescence and photometric activity of an intense green emitting ZnBiBaBFTe:Tb3+glasses

Borotellurite (ZnBiBaBFTe: ZnO + Bi2O3 + BaF2 + B2O3 + TeO2) glasses were fabricated by varying Tb2O3 concentration via the conventional melt and rapid quenching process. The glass stability (150 degrees C) and thermal stress (0.336) were evaluated using the differential thermal analysis. The rising value in the molar volume (39.69-43.86 cm3/mol) and field strengths (6.69-19.41 x 1015 cm- 2) was due to the decrease in the density (2.932-2.804 gm/cm3) and inter-atomic distances (5.25 -3.08 angstrom) of Tb3+ ions in ZnBiBaBFTe glasses. Measured excitation (PLE) and de-excitation (PL) spectra indicated that Tb3+:ZnBiBaBFTe glasses can be efficiently stim-ulated from 377 nm of UV radiation and exhibit a dazzle of green emission (543 nm) belonging to the transition 5D4 -> 7F5 of Tb3+ ion. The radiative parameters of the level 5D4 of Tb3+ ion was predicted from the omega 2, 4, 6 in-tensity parameters by means of the JO (Judd-Ofelt) phenomenological formalism. Rise in Tb3+ concentration led to the enhancement of 5D4 emission transitions and reduction of lifetimes (2.24-1.82 ms) via dipole-dipole interaction. The detailed analysis of glasses revealed efficient lasing action parameters corresponds to branch-ing ratio (> 60%), emission cross-section (14.61 x 10-22 cm2), gain bandwidth (15.34 x 10-28 cm3), and quantum efficiency (79%) along with photometric parameters like (x, y) color coordinates (-0.29, 0.60), color purity (65%), and correlated color temperatures (-6000 K) for green lasing applications.

Automated summary

Borotellurite (ZnBiBaBFTe: ZnO + Bi2O3 + BaF2 + B2O3 + TeO2) glasses were fabricated by varying Tb2O3 concentration via the conventional melt and rapid quenching process. The glass stability (150 degrees C) and thermal stress (0.336) were evaluated using the differential thermal analysis. The rising value in the molar volume (39.69-43.86 cm3/mol) and field strengths (6.69-19.41 x 1015 cm- 2) was due to the decrease in the density (2.932-2.804 gm/cm3) and inter-atomic distances (5.25 -3.08 angstrom) of Tb3+ ions in ZnBiBaBFTe glasses.