Emission analysis of CdO–Bi2O3–B2O3 glasses doped with Eu3+ and Tb3+

Abstract This article reports on the emission properties of cadmium bismuth borate (CdBiB) glasses as a function of doping concentrations of Eu 3+ and Tb 3+ ions. The functional groups present in the glasses have been identified by analyzing FT-IR spectra. The emission spectra of Eu 3+ and Tb 3+ :CdBiB glasses have shown reddish green emissions at 616 nm ( 5 D 0 → 7 F 2 ) under the excitation at 465 nm and at 547 nm ( 5 D 4 → 7 F 5 ) under the excitation at 485 nm, respectively. The Judd–Ofelt (J–O) theory was applied to evaluate the J–O intensity parameters from the absorption and the emission spectra; by using the J–O intensity ( Ω λ ) parameters, spontaneous emission transition probability ( A ), total radiative transition rate ( A T ), radiative lifetime ( τ R ) and branching ratios ( β ) of the various emission transitions have been computed for both Eu 3+ and Tb 3+ :CdBiB glasses. The quenching behavior in the emission intensity with increased concentration of Eu 3+ and Tb 3+ was observed, which could be useful for optimizing the compositions toward practical applications.