Preparation, characterization and luminescence properties of BiPO 4:Eu nanophosphors

Abstract

A facile chemical method was employed to prepare fine BiPO 4:Eu3+ phosphor particles calcined at the same temperature. Introducing lithium greatly affected the morphology of the samples and further affected the luminescence intensity. The samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and photoluminescence (PL) spectroscopy. The XRD patterns of BiPO 4:Eu3+ indicated a monoclinic phase. From the fluorescence spectra, the emission transition 5D0 → 7F1 is more prominent than the normal red emission transition 5D0 → 7F2. Based on the intensity ratios of 5D0 → 7F 2 to 5D0 → 7F1 in the emission spectra, it can be concluded that introducing Li+ can improve the symmetry of the crystal lattice and modify the emission intensity. Sharp lines at 395 nm are the strongest of the f-f transitions and match well with near-UV LED chips. Copyright © 2012 John Wiley & Sons, Ltd. Copyright © 2012 John Wiley & Sons, Ltd.