چكيده به لاتين
Abstract:
Photodetectors are components that convert light into electrical current. In order to verify the performance of a photodetector’s parameters such as dark current, photocurrent, current in light, and response time are defined. In recent years, many studies have been conducted to optimize the parameters of a photodetector..
In this study, the effect of the shape of the electrode and the shape of the electrical contacts in the electro optic parameters of the thin film of ZnO have been investigated. Since the influence of the geometric shape of the electrode on the parameters of the thin film of zinc oxide has not yet been investigated, we have processed a large number of forms. The usual method of creating different designs of the electrode is lithography, but because of the large number of samples and increased costs, we replaced the lithography with another method. In this method, PCB printing was used to create different forms of electrodes on a thin film of zinc oxide. The accuracy of this device for drawing and printing the board is 0.1 mm.
In this research, the FR4 fiberglass substrate has been used because it is the selective method for creating electrodes and its advantages such as flexibility, high surface resistance.
The method of deposition is a sputtering method that has a very high accuracy and low surface contamination.
Dark current test, current in light and response time were designed to measure the parameters of the dark current, current in light and response time.
For study the optical and structural properties of thin film ZnO samples, XRD, SEM, and UV-Visible spectroscopy tests were used.
The results obtained in this study show that some of the proposed samples are much better in many of the detector's parameters than common interdigital MSM.
Keywords: photodetector, thin film of ZnO, shape of electrode, dark current, photocurrent
