Structural and optical studies of CaSO4:Ce3+ nanorods for display and dosimetric applications

• Published in: European physical journal plus Vol. 134; no. 4; p. 177
• Main Authors: Yashaswini, Pandurangappa, C., Dhananjaya, N.
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.04.2019; Springer Nature B.V
• Subjects: Absorption spectroscopy; Applied and Technical Physics; Atomic; Cerium; Chromaticity; Color temperature; Complex Systems; Condensed Matter Physics; Crystallites; Crystallography; Electron diffraction; Fourier transforms; Glow curves; Hexagonal lattice; Infrared spectroscopy; Mathematical and Computational Physics; Molecular; Nanophosphors; Nanorods; Optical and Plasma Physics; Parameter estimation; Phosphors; Photoluminescence; Photomicrographs; Physics; Physics and Astronomy; Regular Article; Scanning electron microscopy; Spectrum analysis; Theoretical; Thermoluminescence; Transmission electron microscopy; X ray powder diffraction; X-ray diffraction
• ISSN: 2190-5444; 2190-5444
• DOI: 10.1140/epjp/i2019-12613-3

. The CaSO 4 :Ce 3+ (1-9mol%) nanorods were successfully synthesized by co-precipitation method. Preliminary crystallographic, structural and optical studies of the prepared nanorods were done using powder X-ray diffraction (PXRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), selected area electron diffraction (SAED), Fourier transform infrared spectroscopy (FTIR), UV-visible absorption spectroscopy, photoluminescence (PL) and thermoluminescence (TL). The CaSO 4 :Ce 3+ has a single phase hexagonal lattice structure with space group P3 1 21(152). The average crystallite size was calculated using Scherrer’s formula and found to be in the range 41-62 nm which is in good agreement with TEM results. The SEM micrographs shows rod like structure with various sizes. Upon 350 nm excitation, the CaSO 4 :Ce 3+ nanophosphor showed emission at 390, 405 and 430 nm, which is characteristic luminescence of 5 d → 4 f ( 2 F 5/2 , 2 F 7/2 ) transitions of the Ce 3+ ions. The chromaticity co-ordinates and correlated color temperature of all the phosphors were well located in blue region. TL glow curve response of the prepared nanorods with 500 Gy γ -irradiated was studied. TL glow curve contains glow peak at 188 ° C. Kinetic parameters was estimated for deconvoluted TL glow peaks and studied in detail.