The Synthesis And Luminescence Properties Of Rare Earth(Eu³⁺,Tb³⁺,Ce³⁺) Doped ?-zirconium Phosphate Nanosheet Phosphors

In recent years,two-dimensional inorganic layered nanomaterials?nanosheets?are receiving great attention due to their size,shape,structure,and potential applications in many fields.Due to the nanosheets with a considerably large surface-to-volume ratio,the photoluminescence excitation energy of nanosheet-based phosphors is more effectively absorbed.It is possible to create new materials by building up various functional nanosheets together with the intercalated guest ions.In this paper,we studied the luminescence properties and energy transfer phenomenon of?-zirconium phosphate??-ZrP?doped with rare earth ions.Tb,Eu,Ce single doped zirconium phosphate?ZrP:Tb,ZrP:Eu,ZrP:Ce?and Tb/Eu,Ce/Tb and Eu/Ce co-doped zirconium phosphate?ZrP:Tb,Eu?ZrP:Ce,Tb?ZrP:Eu,Ce?were prepared by direct precipitation method.The X-ray diffraction,luminescence spectra,fluorescence lifetime,thermo gravimetric analysis,and scanning electron microscopy techniques were performed to characterize the samples.It indicated that the systems of ZrP:RE³⁺had the similar nanosheet structure except with relatively larger interlayer spacing as compared with ZrP,and further confirmed that the rare earth ions were effectively intercalated into the lattice.In ZrP:Tb,Eu host,the red and green emission peaks were simultaneously observed.Moreover,the luminescent intensity and fluorescence lifetimes of Tb³⁺were gradually decreased with the increase of Eu³⁺doping concentration,which reflected the energy transfer phenomenon from Tb³⁺to Eu³⁺.Through optimization the concentration of Eu³⁺,a nearly white-light-emitting was obtained.Additionally,the energy transfer from Ce³⁺?Tb³⁺and Ce³⁺?Eu³⁺were also observed in?-ZrP:Ce³⁺,Tb³⁺and?-ZrP:Eu³⁺,Ce³⁺samples,and the emission color can be tuned by controlling the Ce³⁺concentration.It concludes that the ZrP:RE³⁺nanosheet as a color-tunable phosphor is potential for fabricating optoelectronic devices.