Reduction from Eu3+ to Eu2+ in BaAl2O4 : Eu phosphor prepared in an oxidizing 
atmosphere and luminescent properties of BaAl2O4 : Eu

Peng, Mingying; Hong, Guangyan

doi:10.1016/j.jlumin.2007.04.012

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Reduction from Eu3+ to Eu2+ in BaAl2O4 : Eu phosphor prepared in an oxidizing atmosphere and luminescent properties of BaAl2O4 : Eu

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Peng, Mingying
Max Planck Research Group, Max Planck Institute for the Science of Light, Max Planck Society;

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Peng, M., & Hong, G. (2007). Reduction from Eu3+ to Eu2+ in BaAl2O4: Eu phosphor prepared in an oxidizing atmosphere and luminescent properties of BaAl2O4: Eu. JOURNAL OF LUMINESCENCE, 127(2), 735-740. doi:10.1016/j.jlumin.2007.04.012.

Cite as: https://hdl.handle.net/11858/00-001M-0000-002D-6CFA-6

Abstract

A reduction phenomenon of Eu3+ -> Eu2+ was observed for the first time when Eu3+ ions were doped into an AlO4-tetrahedron-containing compound BaAl2O4 in an oxidizing atmosphere of air by high-temperature solid-state reaction. X-ray powder diffraction patterns and photoluminescent spectra are used to confirm the compound structure and detect the simultaneous existence of both divalent and trivalent europium ions, respectively. The abnormal Eu3+ -> Eu2+ reduction is explained by a charge compensation model. Spectroscopic properties of BaAl2O4:Eu are discussed and Eu2+ emission spectrum shows consistence with the results reported by Katsumata et a]. [J. Cryst. Growth 198/199 (1999) 869.] and Lin et al. [Mater. Chem. Phys. 70 (2001) 156.]. (C) 2007 Elsevier B.V. All rights reserved.