Effect of NaF flux on microstructure and thermoluminescence properties of Sm3+ doped CdSiO3 nanophosphor

• Published in: Journal of luminescence 2013-02, Vol.134, p.432-440
• Main Authors: Manjunatha, C., Nagabhushana, B.M., Sunitha, D.V., Nagabhushana, H., Sharma, S.C., Venkatesh, G.B., Chakradhar, R.P.S.
• Format: Article
• Language: English
• Subjects: Combustion; Combustion synthesis; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Cross-disciplinary physics: materials science; rheology; Diffraction; Exact sciences and technology; Flux; Halide flux; Luminescence; Materials science; Morphology; Nanocrystalline materials; Nanoscale materials and structures: fabrication and characterization; Nanostructure; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Other luminescence and radiative recombination; Phosphor; Physics; Roasting; Scanning electron microscopy; Silicates; Thermoluminescence
• ISSN: 0022-2313; 1872-7883
• DOI: 10.1016/j.jlumin.2012.08.006

This work reports the preparation of CdSiO3:Sm3+ (1–7mol%) nanophosphors by a low temperature solution combustion method. For the first time the effect of NaF flux on the crystallization behavior, morphology, and thermoluminescence property of 5mol% Sm3+ doped CdSiO3 has been investigated. The nanopowders are well characterized by powder X-ray diffraction (PXRD), Fourier Transform Infra-Red (FT–IR), and scanning electron microscopy (SEM). PXRD results indicate that the powder calcined at 800°C for 2h has monoclinic phase. SEM results show that the powder is highly porous and the pore size and shape can be modified by the addition of NaF flux. Addition of NaF could lead to formation of particle type morphology and the increase in wt% of NaF changes crystallinity and phase. The thermoluminescence glow curves for 2–6wt% NaF in CdSiO3:Sm3+ show a single, well resolved glow peak at 126, 130 and 150°C, respectively. But for the sample prepared with 8wt% of NaF flux shows two glow peaks at 148 and 220°C. With the addition of NaF flux, TL intensity can be effectively enhanced. ► CdSiO3:Sm3+ nanophosphors are prepared at much lower temperatures. ► Effect of NaF flux content on the crystal structure, morphology and luminescent properties CdSiO3:Sm3+ is investigated. ► With the addition of 2wt% NaF flux, TL intensity can be effectively enhanced. ► Well resolved TL glow peaks at 126, 130 and 150°C were observed.