Synthesis and luminescent study of Ce3+-doped terbiumayttrium aluminum garnet

Terbiumayttrium aluminum garnets (TYAG) doped with Ce3+ ions have been prepared by solid state reactions between nanostructured oxides of aluminum and rare earths. The luminescent properties of Ce3+ ions in (Tcb0.8Y0.2)3(1-x)Ce3xAl5O12 (N = 0.03) have been studied upon excitation in the 2a20 eV regi...

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Bibliographic Details
Published in:Journal of alloys and compounds 2013-02, Vol.550, p.159-163
Main Authors: Dotsenko, V P, Berezovskaya, I V, Zubar, E V, Efryushina, N P, Poletaev, NI, Doroshenko, YuA, Stryganyuk, G B, Voloshinovskii, A S
Format: Article
Language:English
Subjects:
Aluminum base alloys
Band spectra
Bands
Emission
Excitation
Garnets
Nanostructure
Rare earth metals
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Summary:Terbiumayttrium aluminum garnets (TYAG) doped with Ce3+ ions have been prepared by solid state reactions between nanostructured oxides of aluminum and rare earths. The luminescent properties of Ce3+ ions in (Tcb0.8Y0.2)3(1-x)Ce3xAl5O12 (N = 0.03) have been studied upon excitation in the 2a20 eV region. The substitution of Tb3+ for Y3+ in the garnet structure results in broadening the emission band and shifting its maximum towards the longer wavelengths. It was found that in addition to the 4fn a 4fn-15d excitation bands of Ce3+ and Tb3+ ions, the excitation spectra for the Ce3+ emission contain broad bands at 6.73 and similar to 9.5 eV. These bands are attributed to the Ce3+-bound exciton formation and O 2p a Al 3s, 3p transitions, respectively. In contrast to the predictions based on the results of electronic structure calculations on Y3Al5O12 and Tb4Al2O9, the threshold of interband transitions in TYAG is at high energies (aCO347.3 eV), and contributions from Altetr and Aloct atoms to the conduction-band density of states are evaluated as quite essential.
ISSN:0925-8388