In situ co-precipitation synthesis and luminescence of GdVO 4: Eu 3+ and Y xGd 1 − xVO 4: Eu 3+ microcrystalline phosphors derived from the assembly of hybrid precursors

Abstract

GdVO 4: Eu 3+ and Y x Gd 1 − x VO 4: Eu 3+ phosphors have been synthesized by a new wet-chemical method named as in situ co-precipitation from multicomponent hybrid precursors. Their microstructure and micromorphology have been analyzed by X-ray powder diffraction (XRD) and scanning electronic microscope (SEM), which indicates that there exist some novel cobblestone-like microcrystalline particles, especially for GdVO 4: Eu 3+. The optical characteristic of Y x Gd 1 − x VO 4: Eu 3+ presents that the luminescence intensity reaches the strongest when the molar ratio of Y/Gd is 0.4/0.6 among x = 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, and the phosphor particles show a strong red emission at 618 nm originating from the hypersensitive transition 5D 0 → 7F 2 of Eu 3+ ions.