Synthesis of KBiFe2O5 by electrospinning: Structural, optical, and magnetic properties

• DOI: 10.1016/j.oceram.2022.100297
• Publication Date: 2022-08-19T16:43:42Z
• Authors: Guilherme H.F. Melo; Alexandre J. Gualdi; Rosario E.S. Bretas
• Keywords: Electrospinning

Ferroelectric oxides are currently being studied as absorbing materials in photovoltaic devices due to their spontaneous polarization that facilitates charge separation. KBiFe2O5 (KBFO) is a ferroelectric oxide with perovskite like structure has low band gap; however, it relatively electrical conductivity, which makes difficult transport and collect carriers. One way of overcoming deficiency would be by decreasing the dimensions active layer. Thus, this work, for first time, nanofibers KBFO were produced electrospinning. Aqueous solutions ceramic precursors form Fe, K Bi nitrates electrospun using poly (vinylpyrrolidone) (PVP) carrier. The as-spun fibers calcinated at different temperatures times. pure phase was obtained after calcination 750 °C, during 1.5 h 15 °C/min; had diameters between 300 nm 800 analyzed scanning electron microscopy (SEM). interplanar distances (100) (111‾) planes 0.78 0.37 nm, respectively, calculated VESTA software, x-ray diffraction (XRD) transmission (TEM). Using Magnetization-Field (MxH) curve, found highly paramagnetic magnetization. gap measured spectrophotometry via Tauc plot, resulting value 1.72 eV. Therefore, seems have high potential an material cells.