Show simple item record

dc.creatorĆulubrk, Sanja
dc.creatorAntić, Željka
dc.creatorMarinović-Cincović, Milena
dc.creatorAhrenkiel, Scott Phillip
dc.creatorDramićanin, Miroslav
dc.identifier.issn0925-3467 (print)
dc.identifier.issn1873-1252 (electronic)
dc.description.abstractThis work describes the synthesis and photoluminescent properties of rare earth (Sm3+ and Eu3+) doped Gd2Ti2O7 pyrochlore nanopowders. Pure-phase rare earth-doped Gd2Ti2O7 nanoparticles of approximately 20-50 nm in diameter, as evidenced from X-ray diffraction and electron microscopy analysis, are produced via the mixed metal-citric acid complex method. A temperature of 880 degrees C is identified for the formation of the crystalline pyrochlore phase, based on a differential thermal analysis of Gd2Ti2O7 precursor gels. From photoluminescence excitation and emission spectra, measured at 10 K and room temperature, the energy levels of Sm3+ and Eu3+ ions in Gd2Ti2O7 nanoparticles are obtained. The dependence of luminescence emission intensity and emission decays on rare earth concentration are measured and discussed. The strongest Sm3+ orange-reddish emission is observed for samples containing 2.5 at.% of Sm3+ ions, while in the case of Eu3+, the most intense emission is found for 15 at.% Eu3+ doping. The (4)G(5/2) level lifetime decreases with an increase in Sm3+ concentration, from about 5 ms (for 0.1-0.2 at.% of Sm3+) to 2.4 ms (for 2.5 at.% of Sm3+). With an increase in Eu3+ concentration in the Gd2Ti2O7 nanoparticles, the Eu3+ D-5(0) level lifetime decreases from similar to 5.9 ms (for 0.5 at.% of Sm3+) to 3.1 ms (for 15 at.% of Sm3+). (C) 2014 Elsevier B.V. All rights reserved.en
dc.relationinfo:eu-repo/grantAgreement/MESTD/Integrated and Interdisciplinary Research (IIR or III)/45020/RS//
dc.relationinfo:eu-repo/grantAgreement/MESTD/Basic Research (BR or ON)/172056/RS//
dc.sourceOptical Materialsen
dc.subjectOptical materialsen
dc.subjectPhotoluminescence spectroscopyen
dc.titleSynthesis and luminescent properties of rare earth (Sm3+ and Eu3+) Doped Gd2Ti2O7 pyrochlore nanopowdersen
dcterms.abstractМариновић-Цинцовић Милена; Aнтиц, Зељка; Драмићанин Мирослав; Цулубрк, Сања; Aхренкиел, Пхиллип С.;

Files in this item


There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record