Eu(III)-doped aluminium yttrium oxide.
authors Nassar, EJ; Avila, LR; Pereira, PFS; de Lima, OJ; Rocha, LA; Mello, C; Ciuffi, KJ; Carlos, LD
nationality International
journal QUIMICA NOVA
author keywords YAG; EuIII; sol-gel
keywords SOL-GEL METHOD; SPECTRA; HYBRIDS; MATRIX; ROUTE
abstract Eu(Ill)-DOPED ALUMINIUM YTTRIUM OXIDE. In this work, we report the synthesis and the photoluminescence features of Eu(Ill)-doped yttriurn-aluminium oxide obtained by non-hydrolytic sol-gel routes. After heating the powders above 600 degrees C the XRD patterns show the presence of the Y4Al2O9 (YAM) and Y3Al5O12 (YAG) phases. At 800 and at 1500 degrees C the PL spectra display the Eu(III) lines characteristic of the YAM monoclinic phase. The D-5(0)->F-7(2) transition is favored relatively to the D-5(0)->F-7(1) lines. However, at 1100 degrees C the cubic YAG is the preferential phase and the D-5(0)->F-7(1) transition dominates the spectrum. The Eu(III) ions lie in a centrosymmetrical site. The different solvents used in the sol-gel synthesis also change the relative proportion between these two phases. This is monitored analyzing the modifications in the relative intensity between the D-5(0)->F-7(2) and the D-5(0)->F-7(1) transitions.
publisher SOC BRASILEIRA QUIMICA
issn 0100-4042
year published 2005
volume 28
issue 2
beginning page 238
ending page 243
digital object identifier (doi) 10.1590/S0100-40422005000200014
web of science category Chemistry, Multidisciplinary
subject category Chemistry
unique article identifier WOS:000228184500014
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journal impact factor 0.668
5 year journal impact factor 0.849
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