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

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 469 nm and Fe(III) ions doped phosphor gave the emission peaks at 373 and 450 nm 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.