title: Preparation, characterization and luminescence properties of BiPO4 :Eu nanophosphors.
abstract: A facile chemical method was employed to prepare fine BiPO4 :Eu(3+) 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 BiPO4 :Eu(3+) indicated a monoclinic phase. From the fluorescence spectra, the emission transition (5) D0  → (7) F1 is more prominent than the normal red emission transition (5) D0  → (7) F2 . Based on the intensity ratios of (5) D0  → (7) F2 to (5) D0  → (7) F1 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.
authors.affiliation: School of Chemistry and Chemical Engineering, Jinggangshan University, Ji'an, Jiangxi, 343009, China.
authors.forename: Xiaochun
authors.initials: X
authors.lastname: Zhou
authors.forename: Xiaojun
authors.initials: X
authors.lastname: Wang
mesh_terms: D001729:Bismuth / Q000737:chemistry*; D005063:Europium / Q000737:chemistry*; D049449:Luminescence; D049329:Nanostructures / Q000737:chemistry*; D013050:Spectrometry, Fluorescence
chemical_list: D005063:Europium; D001729:Bismuth; C035883:bismuth phosphate