Combustion synthesis and characterisation of Eu³⁺-activated Y₂O₃ red nanophosphors for display device applications
by Pramod Halappa; S. Thilak Raj; R. Sairani; Siddharth Joshi; R. Madhusudhana; C. Shivakumara
International Journal of Nanotechnology (IJNT), Vol. 14, No. 9/10/11, 2017

Abstract: Europium activated yttrium oxide red phosphors have gathered more attention because of their good luminescent characteristics, acceptable atmospheric stability, reduced degradation under applied voltages, and lack of hazardous constituents. In order to achieve improved luminescent properties of Y₂O₃:Eu³⁺, the synthetic methods are playing an important role. In the present study, Eu³⁺ (2 mol %) doped Y₂O₃ nanophosphors were synthesised by the facile nitrate citrate gel combustion method at relatively low temperature and shorter duration (700°C for 2 h). Further samples were characterised by powder X-ray diffraction (XRD) technique. The morphology and particle size of the phosphors were studied by scanning electron microscope (SEM), UV reflectance spectroscopy and Raman spectroscopy. The photoluminescence measurements of the Y₂O₃:Eu³⁺ particles showed red emission peaks at 610-612 nm (⁵D₀ → ⁷F₂). CIE chromaticity diagram and CCT calculations confirmed that these nanophosphors can act as a red component in the fabrication of white light emitting diodes (WLEDs) for display and other optical device applications.

Online publication date: Sun, 24-Sep-2017

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