Synthesis and characterizations of Eu3+ doped S-FAP nanoparticles prepared by co-precipitation method

Abstract

The Eu3+:Sr5(PO4)3F (Eu3+:S-FAP) nanoparticles were prepared via the co-precipitation method. The XRD and FT-IR results demonstrated different Eu3+ concentrations doped S-FAP nanoparticles were pure phase. The TEM results demonstrated the microscopic morphology of Eu3+:S-FAP changed from short rod-like to nearly spherical when more Eu3+ were introduced. Under 465 nm excitation, the strong red and orange light emissions (579nm, 594 nm, 616 nm, 654 nm, and 712 nm) were presented in the emission spectra, which were corresponding to the transitions of the 5D0→7F0, 7F1, 7F2, 7F3 and 7F4, respectively. When more Eu3+ were introduced, the emission intensity of Eu3+:S-FAP nanoparticles was greatly enhanced and the fluorescence lifetimes of Eu3+:S-FAP nanoparticles gradually reduced. The Eu3+:S-FAP transparent ceramics were fabricated by vacuum hot pressing sintering method and its transmittance exceeded 80 % in the near-infrared band. These results above indicate Eu3+:S-FAP is a kind of potentially visible luminescent material.