title: Orange light-emitting Ca3Mg3(PO4)4:Sm3+phosphors.
abstract: This work reports the photoluminescence properties of Ca3Mg3(PO4)4:Sm3+phosphors that were synthesized by the combustion method. The phase formation and morphology of the prepared phosphors were analysed by X-ray diffraction studies and scanning electron microscopy. Ca3Mg3(PO4)4:Sm3+phosphors give orange light emission when excited by near-ultraviolet (NUV) and blue light. The photoluminescence characteristics of the as-prepared phosphors were investigated and their emission spectra showed three peaks due to4G5/2→6H5/2,4G5/2→6H7/2and4G5/2→6H9/2transitions. The mechanism responsible for the concentration quenching of luminescence was found to be an electric dipole-dipole interaction. The CIE chromaticity coordinates suggested that the prepared phosphors are potential candidates for orange light-emitting diodes (LEDs).
authors.affiliation: Department of Physics, R.T.M. Nagpur University, Nagpur, 440033, Maharashtra, India.
authors.forename: Govind B
authors.initials: GB
authors.lastname: Nair
authors.affiliation: Department of Physics, R.T.M. Nagpur University, Nagpur, 440033, Maharashtra, India.
authors.forename: S J
authors.initials: SJ
authors.lastname: Dhoble
mesh_terms: D002118:Calcium / Q000737:chemistry*; D008027:Light; D049449:Luminescence; D008274:Magnesium / Q000737:chemistry*; D010316:Particle Size; D010710:Phosphates / Q000737:chemistry*; D055668:Photochemical Processes; D012493:Samarium / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D010710:Phosphates; D012493:Samarium; D008274:Magnesium; D002118:Calcium
keywords: LED; orange emission; phosphate; phosphor