Tunable Optical Properties Of Bi1/2na1/2tio3 Materials Via Sm1/2na1/2tio3 Addition

In this work, the Sm1/2Na1/2TiO3-addition Bi1/2Na1/2TiO3 materials as solid solutions were synthesized via a chemical route method. The X-ray diffraction and Raman scattering results indicated that Sm1/2Na1/2TiO3 materials were well solute into the host Bi1/2Na1/2TiO3 materials to form solid solutions. The optical bandgap of the pure Bi1/2Na1/2TiO3 materials was estimated from ultraviolet-visible spectroscopy of 3.07 eV. The bandgap slightly reduced to 2.94 eV as increasing the Sm1/2Na1/2TiO3 amounts up to 9 mol.%. Strong photoluminescence (PL) of Sm1/2Na1/2TiO3-addition Bi1/2Na1/2TiO3 materials was obtained in the visible wavelength range of 550-750 nm which related to photoluminescence of Sm cations randomly incorporated into the host lattice of Bi1/2Na1/2TiO3 materials. Our work was promised to show a new method to integrate the PL properties in leadfree ferroelectric materials.