Abstract
The present work report a series of trivalent Europium (Eu3+) doped well crystallized perovskite CaTiO3 phosphors successfully synthesized by chemical co-precipitation method. The crystal structure was confirmed by X-ray diffraction (XRD) which is in good agreement with pure orthorhombic phase with space group Pbnm, and it also indicated that the incorporation of the dopant did not affect the crystal structure. The impact of doping on the photoluminescence performances of the sample has been investigated by emission, excitation, and diffuse reflectance spectra at the room temperature. Photoluminescence spectra of Eu3+ doped CaTiO3 nanophosphor revealed the characteristic emission peak around wavelength 618nm in the visible region upon the excitation of near-UV light at wavelength 397nm due to 5D0 → 7F2 transition in Eu3+. It was further proved that the dipole– dipole interactions results in the concentration quenching of Eu3+ in CaTiO3:Eu3+ nanophosphors. The elemental composition of sample carried out by energy dispersive spectroscopy (EDS). EDS analysis reveals that the Eu3+ doped successfully into host CaTiO3. The experimental result reveals that prepared nanophosphor can be used in the application of solid state lighting devices.
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