Luminescence properties and electronic structure of Ce3+-doped gadolinium aluminum garnet

被引：15

作者：

Dotsenko, V. P. ^{[1
]}

Berezovskaya, I. V. ^{[1
]}

Voloshinovskii, A. S. ^{[2
]}

Zadneprovski, B. I. ^{[3
]}

Efryushina, N. P. ^{[1
]}

机构：

[1] Natl Acad Sci Ukraine, AV Bogatsky Phys Chem Inst, UA-65080 Odessa, Ukraine

[2] Ivan Franko Natl Univ Lviv, UA-79005 Lvov, Ukraine

[3] Cent Res & Dev Inst Chem & Mech, Moscow 115487, Russia

来源：

MATERIALS RESEARCH BULLETIN | 2015年 / 64卷

关键词：

Oxides; Chemical synthesis; Luminescence; Electronic structure; Phosphors; OPTICAL-PROPERTIES; TEMPERATURE; PHOSPHOR; SCINTILLATORS; EFFICIENCY; CRYSTALS; FIELD; CE3+;

D O I：

10.1016/j.materresbull.2014.12.056

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Yttrium-gadolinium aluminum garnets (YGdAG) doped with Ce3+ ions have been prepared by co-precipitation method. The luminescent properties of Ce3+ ions in Gd3(1-x)Ce3xAl5O12 (x = 0.01) have been studied upon excitation in the 2-20 eV region. The substitution of Gd3+ 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 4f -> 5d excitation bands of Ce3+ ions, the excitation spectra for the Ce3+ emission contain bands at 6.67, 7.75, and 9.76 eV. These bands are attributed to the Ce3+-bound exciton formation and O 2p -> 4 Al 3s, 3p transitions, respectively. Although gadolinium states dominate near the bottom of the conduction band of Gd3Al5O12, contributions from Al-tetr and Al-oct atoms to the conductionband density of states are evaluated as quite essential. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：151 / 155

页数：5

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