Luminescence properties of ZnO/TiO 2 nanocomposite activated by Eu 3 + and their spectroscopic analysis

Abstract

A new type of novel orange-red emitting Eu-doped ZnO/TiO 2 nanocomposite phosphors have been synthesized by simple low temperature co-precipitation route. Structure and morphology of the prepared sample have been investigated using X-ray diffraction and field emission scanning electron microscopy (FESEM) techniques. XRD pattern confirmed the presence of both phases of ZnO and TiO 2 simultaneously. The luminescence properties, such as photoluminescence (PL) excitation and emission spectra, Judd-Ofelt parameters, CIE colour coordinates and the dependence of luminescence intensity on the doping level were investigated. The luminescence spectrum characteristics of Eu 3+ ions have a strong dependence on Eu 3+ doping levels as well as ZnO/TiO 2 ratio variations. The photoluminescence results indicate that these phosphors could be efficiently excited by near-ultraviolet radiation, which causes emissions in orange-red regions.

Heterogeneous Ternary Metal Oxide Nanocomposites for Improved Advanced Oxidation Process under Visible Light

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Synthesis of TiO₂/ZnO Nanocomposites by the Electrochemical Method and Their Application in Dye-Sensitized Solar Cells (DSSCs)

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