Influence of Irradiation Time on Structural, Morphological Properties of ZnO-NRs Films Deposited by MW-CBD and Their Photodiode Applications

Abstract EN

Microwave-assisted chemical bath deposition (MW-CBD) was used to deposit zinc oxide nanorods (ZnO-NRs) films by using different microwave irradiation time.

The films exhibit a good crystallinity having a hexagonal wurtzite phase formation.

Although the dominant preferred orientation was not observed for the ZnO-5 and ZnO-10, ZnO-8 showed (002) preferred orientation.

The emission scanning electron microscope (FESEM) showed almost randomly oriented hexagonal nanorods on the surface.

A slight decrease in the length of the observed hexagonal nanorods due to the increase in the irradiation time was observed, changing from 550 nm to 300 nm.

The p-Si/n-ZnO-NRs heterojunction photodiodes were fabricated.

The current-voltage characteristics of these photodiodes were investigated under dark and different illumination intensity.

An increase in the reverse current with increasing illumination intensity confirmed that the fabricated photodiodes exhibited a photoconducting behavior.

In addition, the barrier height and series resistance values of the photodiodes were determined from capacitance-voltage measurements.