Synthesis, structure and optical properties of lithium and zinc doped BiFeO3 by sol gel method

Abstract

BiFeO3 is one of the multiferroic materials and have a wide range of application. For that reason, pure BiFeO3 (BFO), Li and Zn doped BFO were synthesized by sol-gel method. Structure and optical properties of BiFeO3 were characterized by using X-ray diffractometer and UV-Vis spectrophotometer. Pure BiFeO3 and single phase Li-doped BiFeO3 were detected from XRD pattern. Two-phase were identified in Zn doped BiFeO3. The Structure parameters of the three samples seem altered. Doping Li and Zn decrease crystal parameter. The Energy gap was calculated from the UV-Vis absorbance pattern, and pure BiFeO3, Li and Zn doped BiFeO3 have energy gaps 2.81, 3.19 and 4.82 eV respectively. The decrease of crystallite structure caused by the doping would raise the band gap energy.