☆ 4.5 Article

Application of photochemical method in the synthesis of Ga2O3-X thin films co-doped with terbium and europium

SOLID STATE SCIENCES (2014)

Journal

SOLID STATE SCIENCES

Volume 27, Issue -, Pages 24-29

Publisher

ELSEVIER

DOI: 10.1016/j.solidstatesciences.2013.11.002

Keywords

Photochemical deposition; Thin films; Optical materials; Luminescent materials

Categories

Chemistry, Inorganic & Nuclear Chemistry, Physical Physics, Condensed Matter

Funding

National Fund for Scientific and Technological Development, Chile (FONDECYT) [1100045]

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Abstract

Ga2O3-X thin films co-doped with terbium and europium have been prepared by photochemical metal-organic deposition. In this process, solutions containing Ga(III), Tb(III) and Eu(III) 2,2,6,6-tetramethyl-3,5-heptanedionate complexes were spin coated on silicon and quartz substrates. Upon irradiation, the photosensitive of the complexes precursors undergoes decomposition, leaving a gallium oxide amorphous thin film containing terbium and europium. The photo-reactivity of these films was monitored by UV vis and FT-IR spectroscopy. The obtained films were characterized by X-ray photoelectron spectroscopy and X-ray diffraction. Under UV light excitation (254 nm) the doped films (Ga2O3-X-Tb) show the characteristic emissions associated to D-5(4) -> F-7(J) = 6, 5, 4, 3) transitions of terbium ion. However, these emissions decrease with the co-doped films (Ga2O3-X-Tb-Eu). Analysis suggests an energy transfer process among terbium and europium ions. (C) 2013 Elsevier Masson SAS. All rights reserved.

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