title: Synthesis, structural and spectroscopic investigations of nanostructured samarium oxalate crystals.
abstract: Nanostructured samarium oxalate crystals were prepared via microwave assisted co-precipitation method. The crystal structure and morphology of the sample were analyzed using X-ray powder diffraction, Scanning electron microscopy and Transmission electron microscopy. The presence of functional groups is ascertained by Fourier transform infrared spectroscopy. Samarium oxalate nanocrystals of average size 20 nm were aggregated together to form nano-plate structure in sub-microrange. Detailed spectroscopic investigation of the prepared phosphor material was carried out by Judd-Ofelt analysis based on the UV-Visible-NIR absorption spectra and photoluminescence emission spectra. The analysis reveals that the transition from energy level (4)G5/2 to (6)H7/2 of Sm(3+) ion has maximum branching ratio and the corresponding orange emission can be used for display applications.
authors: School of Pure and Applied Physics, Mahatma Gandhi University, Kottayam 686560, India.
authors: G
authors: G
authors: Vimal
authors: School of Pure and Applied Physics, Mahatma Gandhi University, Kottayam 686560, India.
authors: Kamal P
authors: KP
authors: Mani
authors: School of Pure and Applied Physics, Mahatma Gandhi University, Kottayam 686560, India.
authors: P R
authors: PR
authors: Biju
authors: School of Pure and Applied Physics, Mahatma Gandhi University, Kottayam 686560, India. Electronic address: cyriacmgu@gmail.com.
authors: Cyriac
authors: C
authors: Joseph
authors: School of Pure and Applied Physics, Mahatma Gandhi University, Kottayam 686560, India.
authors: N V
authors: NV
authors: Unnikrishnan
authors: School of Pure and Applied Physics, Mahatma Gandhi University, Kottayam 686560, India.
authors: M A
authors: MA
authors: Ittyachen
mesh_terms: D049449:Luminescence; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D010070:Oxalates / Q000737:chemistry*; D012493:Samarium / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D014961:X-Ray Diffraction
chemical_list: D010070:Oxalates; D012493:Samarium
keywords: Branching ratio; Judd–Ofelt analysis; Nanocrystal; Phosphor material; Photoluminescence