Novel Eu~(3+)-doped lead telluroborate glasses for red laser source applications

摘要

We report the absorption, luminescence and decay analysis of Eu ~(3+)-doped lead telluroborate (PTBEu) glasses for different Eu ~(3+) concentrations ranging from 0.1 to 2.0 mol%. Judd-Ofelt intensity parameters obtained from ~5D_0→~7F _(J=0-6) emission transitions of Eu~(3+) were used to calculate the radiative transition probabilities, luminescence branching ratios and radiative decay times. The luminescence spectra and decay times were measured at 464 nm excitation. The optical band gap energies are also determined. The luminescence intensity ratio, color purity and emission cross-section values support that the PTBEu20 glass is a suitable candidate for red laser source applications.