Eu3+ as a spectroscopic probe in phosphors based on spherical fine particle gadolinium compounds ☆

Abstract This work reports on the luminescence spectroscopy sensitivity in the determination of the phase purity in gadolinium compounds using Eu 3+ as a probe. Cubic Gd 2 O 3 and hexagonal Gd 2 O 2 S doped with Eu 3+ spherical fine particles were obtained from doped gadolinium basic carbonates with morphological control and were also characterized by IR and XRD. Doped samples present Eu 3+ characteristic transitions, with specific energy positions related to each phase. Emission and excitation spectra patterns were established for oxide and oxysulfide compounds, then oxysulfate and oxide impurities generated during oxysulfide preparation were monitored. From emission spectra some experimental intensity parameters were also calculated. All spectroscopic results reflect the presence or not of impurities in all compounds.