Characterization and Photodetector of Zinc Oxide/Si thin films prepared by Spray Pyrolysis Technique

Abstract

Zinc oxide (ZnO) nanoparticles via spray pyrolysis technique on the glass and Si substrates, was employed as a photodetector. XDR analysis shows, the sharp and strong peaks observed at diffraction angles 2Θ° of 31.83°,34.49°,36.32° corresponded to the, (100) (002) and (101) planes respectively. Some added peaks with small intensities were noticed with orientation (110), (102), (103) and (200). Optical properties of prepared films show a peak position at 365 nm and energy gap value is 3.8eV of ZnO nanoparticles. The AFM indicates that the product is approximately a spherical shape and that the average diameter of the particles about 63.96 nm. The current voltage characterization shows in the case of reverse bias, a stream of illumination was greater than the current of darkness. In the front bias, the current of darkness is a close value and the current of light changes greatly. The detector parameters (responsivity and quantum efficiency) of ZnO NPs also calculated.