Synthesis and characterization of undoped and Fe(III) ions doped NaCaAlPO4F3 phosphor

• Published in: Journal of luminescence Vol. 145; pp. 324 - 329
• Main Authors: Pushpa Manjari, V., Rama Krishna, Ch, Venkata Reddy, Ch, Muntaz Begum, Sk, Reddy, Y.P., Ravikumar, R.V.S.S.N.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01-01-2014; Elsevier
• Subjects: Absorption spectra; Chromaticity; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Crystal field parameters; Crystallites; Electron paramagnetic resonance; Electron paramagnetic resonance and relaxation; Emission; Exact sciences and technology; Lattice dynamics; Magnetic resonances and relaxations in condensed matter, mössbauer effect; Mathematical analysis; NaCaAlPO4F3 phosphor; Optical absorption; Optical constants: refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Optical properties of bulk materials and thin films; Phonon states and bands, normal modes, and phonon dispersion; Phonons and vibrations in crystal lattices; Phosphors; Photoluminescence; Physics; Powder X-ray diffraction; Scanning electron microscopy; Electron paramagnetic resonance; Crystal field parameters; Optical absorption; Photoluminescence; NaCaAlPO4F3 phosphor; Powder X-ray diffraction; Phosphates; Fourier transform spectroscopy; F; Doping; Luminescence; phosphor; Iron; XRD; Emission spectra; Crystallographic site; Iron additions; Excitation; Absorption spectra; EPR spectra; Optical spectrum; Scanning electron microscopy; Crystal field; Infrared spectra; Lattice parameters; Ultraviolet radiation; Phosphors; Solid state reaction; Vibrational modes; NaCaAlPO; Chromaticity
• ISSN: 0022-2313; 1872-7883
• DOI: 10.1016/j.jlumin.2013.07.052

Undoped and Fe(III) ions doped NaCaAlPO4F3 phosphor has been synthesized using solid state reaction method. The prepared phosphor material was characterized by powder X-ray diffraction (XRD), SEM with EDS, optical absorption, photoluminescence (PL), electron paramagnetic resonance (EPR) and FT-IR techniques. The average crystallite size was calculated from powder XRD data. SEM micrographs show the presence of several irregular shaped particles. Optical absorption spectrum exhibited the characteristic absorption bands of Fe(III) ions in distorted octahedral site symmetry. EPR spectrum exhibited two resonance signals at g=4.25 and g=2.00. PL spectrums of both undoped phosphor exhibits emission peaks at 407, 413 and 469nm and Fe(III) ions doped phosphor gave the emission peaks at 373 and 450nm under UV excitation. The Commission Internationale deI'Eclairage (CIE) chromaticity coordinates for undoped and Fe(III) ions doped NaCaAlPO4F3 phosphor material are calculated from the emission spectrum. Vibrational bands related to phosphate molecules, P–O–H and hydroxyl ions are observed in the FT-IR spectrum.
•Undoped and Fe(III) ions doped NaCaAlPO4F3 phosphor has been synthesized by using solid state reaction.•The average crystalline size is about for undoped sample 53 and for Fe(III) doped sample 69nm.•Fe(III) ions are in tetragonally distorted octahedral site symmetry.•The prepared material may be used as UV LEDs and display devices.