Preparation and Characterization of Lanthanum Doped Calcium Aluminate Nanophosphor (CaAl2O4: La) by Sol-Gel Method

Abstract

Abstract

Lanthanum doped calcium aluminate nanophosphor (CaAl₂O₄: La) was prepared by sol-gel method. Characterizations such as XRD, SEM, EDAX and PL were done. Monoclinic structure was confirmed by the XRD analysis; the particle size was found to be 27 nm and is determined by (Williamson and Hall plot) W-H plot method. It shows that the particles were of small granular structure, and were interlinked with each other, lead to the formation of bigger particles. Also it is found that some irregular aggregations were formed in the image. PL emission was obtained at 390, 520, 790 nm corresponding to blue, green and IR region of the spectrum for 360 nm excitation.

Keywords: XRD, SEM, EDAX, PL, W-H plot, sol-gel method