Luminescence properties and electronic structure of Ce{sup 3+}-doped gadolinium aluminum garnet

Journal Article · Wed Apr 15 04:00:00 EDT 2015 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2014.12.056· OSTI ID:22475726

Berezovskaya, I. V. ^[1]; Voloshinovskii, A. S. ^[2]; Zadneprovski, B. I. ^[3]; Efryushina, N. P. ^[1]

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1. A.V. Bogatsky Physico-Chemical Institute, National Academy of Sciences of Ukraine, 86 Lustdorfskaya doroga, 65080 Odessa (Ukraine)
2. Ivan Franko National University of Lviv, 8 Kirilo i Mefodii, 79005 Lviv (Ukraine)
3. Central Research and Development Institute of Chemistry and Mechanics, 115487 Moscow (Russian Federation)

Highlights: • The luminescence properties of Ce{sup 3+} ions in (Y, Gd){sub 3}Al{sub 5}O{sub 12} are analyzed. • The Gd{sup 3+} → Y{sup 3+} substitution leads to increasing of Ce{sup 3+} noncubic crystal field splitting parameter. • The excitation spectra for the Ce{sup 3+} emission in GdAG contain bands at 6.67, 7.75, and 9.76 eV. • These features are due to the Ce{sup 3+}-bound exciton formation and O 2p → Al 3s, 3p transitions. • Contributions from Al atoms to the conduction-band density of states are quite essential. - Abstract: Yttrium-gadolinium aluminum garnets (YGdAG) doped with Ce{sup 3+} ions have been prepared by co-precipitation method. The luminescent properties of Ce{sup 3+} ions in Gd{sub 3(1−x)}Ce{sub 3x}Al{sub 5}O{sub 12} (x = 0.01) have been studied upon excitation in the 2–20 eV region. The substitution of Gd{sup 3+} for Y{sup 3+} 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 4f → 5d excitation bands of Ce{sup 3+} ions, the excitation spectra for the Ce{sup 3+} emission contain bands at 6.67, 7.75, and 9.76 eV. These bands are attributed to the Ce{sup 3+}-bound exciton formation and O 2p → Al 3s, 3p transitions, respectively. Although gadolinium states dominate near the bottom of the conduction band of Gd{sub 3}Al{sub 5}O{sub 12}, contributions from Al{sub tetr} and Al{sub oct} atoms to the conduction-band density of states are evaluated as quite essential.

• OSTI ID: 22475726
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Vol. 64; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM COMPOUNDS
CERIUM ADDITIONS
COPRECIPITATION
CRYSTAL FIELD
DOPED MATERIALS
EXCITATION
GADOLINIUM COMPOUNDS
GARNETS
LUMINESCENCE
SPECTRA
SYNTHESIS
YTTRIUM COMPOUNDS