Eu3+ emission in phosphate glasses with high UV transparency

• DOI: 10.1016/j.jlumin.2014.04.043
• Publication Date: 2014-05-14T08:34:35Z
• Authors: G.H. Silva; V. Anjos; M.J.V. Bell; A.P. Carmo; A.S. Pinheiro; N.O. Dantas
• Keywords: Europium; Ultraviolet; Phosphate glass

Abstract We report a study of the phosphate glass PZABP (P 2 O 5 –ZnO–Al 2 O 3 –BaO–PbO) doped with europium (Eu 3+ ) in different concentrations. Absorption, photoluminescence and time resolved photoluminescence were used to investigate the influence of increasing Eu 3+ concentrations. The present glass exhibits Eu 3+ absorption bands in the ultraviolet region (about 300 nm) due to the high transparency of the system compared to other phosphate glasses. In this way, it was possible to obtain the Judd–Ofelt parameters from the emission and absorption spectra. Moreover, a strong red emission attributed to the transition 5 D 0 → 7 F 2 of Eu 3+ (611 nm) was observed. It was found that the radiative lifetime and the quantum efficiency of the Eu 3+ level, 5 D 0 , do not suffer a significant change as the concentration of Eu 3+ ions increases.