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

This article reports on the emission properties of cadmium bismuth borate (CdBiB) glasses as a function of doping concentrations of Eu3+ and Tb3+ ions. The functional groups present in the glasses have been identified by analyzing FT-IR spectra. The emission spectra of Eu3+ and Tb3+:CdBiB glasses have shown reddish green emissions at 616 nm (5D0→7F2) under the excitation at 465 nm and at 547 nm (5D4→7F5) 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 (Ωλ) parameters, spontaneous emission transition probability (A), total radiative transition rate (AT), radiative lifetime (τR) and branching ratios (β) of the various emission transitions have been computed for both Eu3+ and Tb3+:CdBiB glasses. The quenching behavior in the emission intensity with increased concentration of Eu3+ and Tb3+ was observed, which could be useful for optimizing the compositions toward practical applications.