Structural, morphological and photoluminescence properties of Eu3+ doped Cd2Sr(PO4)2 nanopowder

Abstract

Eu3+ doped cadmium strontium phosphate (Cd2Sr(PO4)2CSP) Nanopowder was synthesized by a simple and well known solid-state reaction method (SSR). The prepared nanopowder was characterized by various analytical techniques such as powder X-ray diffraction (P-XRD), scanning electron microscope (SEM) with energy dispersive X-ray spectroscopy (EDS), Fourier transform infrared spectroscopy (FT-IR), diffuse reflectance spectroscopy (DRS) and photoluminescence (PL) studies analysis along with photometric. Based on the results of XRD, the typical crystallite size of the as-prepared nanopowder is found to be 20 nm. The morphological study reveals that the sample has uneven distribution of nano-flakes like structure. The existence of vibrational bands of phosphate ions in the sample were identified by FT-IR spectroscopy. The DRS studies reveal that the sample has wide optical direct bandgap value of 5.4 eV. The Photoluminescence studies showed that the CSP nanopowder sample doped with Eu3+ ions exhibit six distinct emission bands which are ascribed to electronic transitions arose from 5D0 – 7FJ(J=0,1,2,3,4,5) corresponding to wavelengths 538 nm 588 nm, 612 nm, 651 nm, 698 nm and 724 nm respectively. In the present work it was found that the electronic transition from 5D0 → 7F2 at 612 nm (ED) is more intense than the transition from 5D0 → 7F1 at 588 nm (MD) resulting in Eu3+ ions asymmetry nature around the host site. The Photometric parameters like CIE chromatic coordinates, Color Correlated Temperature (CCT), Color Rendering Index(CRI), and Color purity(CP) reveals that the Eu3+ doped CSP nanopowder ions has potential application in the field of solid state lighting.