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Issue 30, 2012
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Structural and spectroscopic characterizations of two promising Nd-doped monoclinic or tetragonal laser tungstates

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Abstract

The tetragonal Cd0.25Nd0.500.25WO4 compound (□ – statistically distributed vacancies in cation sublattice) and its gadolinium diluted Cd0.25Gd0.500.25WO4:Nd3+ analogue as well as the monoclinic CdNd2W2O10 phase and its yttrium diluted CdY2W2O10:Nd3+ analogue were synthesized by the high temperature solid-state reaction. The gadolinium or yttrium diluted samples were doped with different concentrations of the active Nd3+ ion: 0.25, 0.5, 2.5 and 5 mol%. X-ray powder diffraction, IR spectra as well as electron microscopy (SEM and HRTEM) were used to identify their structure and morphology. All micromaterials were obtained as spherical particles with average diameters between 1 and 10 μm. In order to study their spectroscopic properties, high resolution absorption and emission spectra in the visible and IR regions were measured at room temperature, 77 K and 4 K. The kinetics of luminescence from the lowest 4F3/2 energy level as a function of the Nd3+ ion concentration and temperature is also reported. Both the values of the absorption cross-section calculated for 5 mol% of Nd3+ ion, and the very strong emission of the 4F3/24I11/2 laser channel of Nd3+ recorded under Xe lamp excitation or OPO laser pumping, indicate that the scheelite-type Cd0.25Gd0.500.25WO4:Nd3+ phase can be considered as a promising laser material. The radiative lifetimes of IR luminescence are also appropriate for potential applications of this phosphor as a solid-state laser.

Graphical abstract: Structural and spectroscopic characterizations of two promising Nd-doped monoclinic or tetragonal laser tungstates

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Publication details

The article was received on 09 Feb 2012, accepted on 08 May 2012 and first published on 11 May 2012


Article type: Paper
DOI: 10.1039/C2JM30799E
Citation: J. Mater. Chem., 2012,22, 14896-14906
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    Structural and spectroscopic characterizations of two promising Nd-doped monoclinic or tetragonal laser tungstates

    M. Guzik, E. Tomaszewicz, Y. Guyot, J. Legendziewicz and G. Boulon, J. Mater. Chem., 2012, 22, 14896
    DOI: 10.1039/C2JM30799E

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