Effect of Holding Time on Optical Structure Properties of Ba(Zr0.5Ti0.5)O3 Thin Film Using Sol-Gel Method

Abstract

The ferroelectric thin film material of barium zirconium titanate (BZT) on the fluorine-doped tin oxide (FTO) glass substrate was successfully prepared using the sol-gel method. The purpose of this study was to determine the effect of crystal size on the variation of holding time. The lattice parameter data has a value of a = b of 3.918 Å and for c it is 4.01 Å. The results of this study indicate that the crystal structure of BZT is tetragonal because the lattice parameter has the same values a and b but not equal to c. To obtain the bandgap energy, a thin film plot method of Ba(Zr0,5Ti0,5)O3 was used at a temperature of 700 °C with a holding time of 30 minutes, 1 hour, 1 hour 30 minutes, and 2 hours. The optical thin layer bandgap energy of Ba(Zr0.5Ti0.5)O3 was calculated using the Tauc plot. The absorbance values obtained were 3.277 a.u, 3.0654 a.u, 3.323 a.u, and 3.424 a.u. The maximum transmission (TM) occurs at 1 hour holding time which gives a percentage of TM₁ 44.477% and TM₂ 20.568%. While the 2 hour hold time gives a minimum transmission (Tm) of Tm₁ 10.859% and Tm₂ 7.759%, respectively.