Synthesis ZnO nanoclusters micro active area using continues wave blue laser-assisted chemical bath deposition based on UV photodetector

Abstract

In this study, zinc oxide (ZnO) thin films were utilized to create metal–semiconductor–metal (MSM) structured ultraviolet (UV) photodetectors using laser assisted chemical bath deposition (LACBD). For the first time, LACBD has successfully manufactured zinc oxide (ZnO) nanoclusters (NCs) with high-quality structural, optical, and electrical properties on a glass substrate coated with iron (Fe) to construct an MSM UV photodetector with high responsivity. The thin film was created by irradiating the chemical bath in situ using a continuous wave semiconductor laser with wavelength(460 nm), output power (1 W), and irradiation laser time (30 min). The thin film was characterized using field emission scanning electron microscopy (FE-SEM), energy dispersive X-ray (EDX) analyses, and X-ray diffractometry (XRD). Our findings revealed that LACBD promoted the development of a high-crystallinity ZnO thin film. The effectiveness of ZnO NCs in UV detection has also been examined to account for the potential of these nanostructures. The device's current-voltage (I-V) characteristics were tested in dark and light situations, confirming the UV photodetector's excellent responsiveness and stability. Optical confinement, a high surface-to-volume ratio, and the superior structural quality of the NCs, as confirmed by time-resolved spectroscopy, are all factors in the great photodetector performance.