Electrical measurement of modified sol-gel derived lead titanate thin films capacitor

The thin films of lead titanate (PbTiO₃) have been prepared on ITO coated glass substrate by means of storage element for DC power application. The solution was prepared by modified sol-gel process that involved sonication process to ensure the uniform nanoparticulates formation before ageing stage take parts. In the need to compensate the lead loss, extra 10mol% of Pb content was added to the solution. The thin films were deposited at high spin speed around 3500 rpm at 30 seconds with multiple coating processes. Microstructural observation was done through scanning electron microscopy that shows the existence of zero layers between PbTiO₃ and ITO electrode and the film thickness was about ~420nm. Besides that, electrical properties of PbTiO₃ thin films were measured by using impedance spectroscope analyzer and 2-points probe solar simulator for dielectric and i-v characteristic respectively. It was found that the dielectric constant value achieved 153 at 1000 Hz plus with approachable of 0.723 energy loss. It is certainly noticed that the thin films was in ohmic behavior where the current density was about 10^-9A/cm².