Influence of Eu³⁺-doped BaTiO₃ phosphors on structural, optical and photoluminescence properties

Ba_1-xEu_xTiO₃ (x = 0.00, 0.02, 0.04, 0.06) phosphor materials were prepared by mixed oxide solid-state sintering method. Different characterization methods were used to analyze the phosphor samples such as PXRD, SEM–EDX, UV–visible, Raman and photoluminescence spectroscopy. PXRD datasets revealed that the phosphors crystallized by tetragonal with single phase. The addition of Eu³⁺ ion influence on the grain size and energy band gap were found to decrease revealed by SEM images and UV–Visible spectra, respectively. Raman spectroscopy provided useful information on the presence of tetragonal symmetry. Charge density distribution study revealed the chemical bonding nature between the constituent ions in the unit cell. Photoluminescence (PL) measurements showed that the excitation intensity gradually increased with addition of Eu³⁺ ions. As a result, broad red emission in the wavelength around 615 nm due to the f–f transition of ⁵D₀ → ⁷F₂ due to Eu³⁺ ions. The incorporation of Eu³⁺ ions in Ba_0.94Eu_0.06TiO₃ phosphor was found to observe good and higher emission intensity. In addition, the thermal stability studies were demonstrated the Ba_0.94Eu_0.06TiO₃ phosphor has good PL property. This phosphor may suitable for lighting applications.