LAUSR

In this study, the films of Bi4−xEuxTi3O12 (x = 0, 0.2, 0.4, 0.6, 0.8) were prepared on substrates (Pt(111)/Ti/SiO2/Si(100)) by the spin-coating method. The results indicate that the films of Bi4−xEuxTi3O12 annealed at 700 °C consist of Bi4Ti3O12 and Pt from the substrates. This indicates that Eu3+ has dissolved into the lattice of Bi4Ti3O12. The doping of Eu3+ to the films of Bi4Ti3O12 enhances ferroelectric properties as well as photoluminescent properties. The films of Bi4−xEuxTi3O12 show two orange emission perks at 590 nm and 595 nm, and a red emission at 613 nm. These three peaks are ascribed to 5D0 → 7F0, 5D0 → 7F1, and 5D0 → 7F2, respectively. The bandgaps of the films of Bi4−xEuxTi3O12 range from 3.07 eV to 2.86 eV with the increase of the doping concentration of Eu3+. Bi3.4Eu0.6Ti3O12 film possesses maximal remanent polarization, minimal leakage current density, and greatest emission intensity.