Supporting information for Tuning bandgap and controlling oxygen vacancy in BiFeO3 via Ba(Fe1/2Nb1/2)O3 substitution for enhanced bulk ferroelectric photovoltaic response in Al/BFO-BFN/Ag solar cell

See supplementary material for ADXRD patterns and Rietveld refinement graphs for all BFO-BFN compositions, changing the octahedral tilt rotation for 95BFO-5BFN and 80BFO-20BFN samples, Lorentz fit for variations in Raman modes of vibration and Raman shift for BFO with different BFN substitutions, wide-range X-ray photoelectron spectroscopy (XPS) survey spectra showing the chemical state of each element in 95BFO-5BFN, 90BFO-10BFN, and 80BFO-20BFN samples and the Voc of 80BFO-20BFN compared with reported values as a function of material thickness.