Synthesis and Characterization of Au:CuO Nanocomposite by Laser Soldering on Porous Silicon for Photodetector

Abstract

This work aimed to the synthesize of composite Au:CuO (NPs) by pulsed laser soldering
process. The optical properties, stability, structural properties and surface morphology of Au:CuO
nanocomposite were characterized by UV–VIS spectrophotometer, Zeta potential measurement, XRay
Diffraction pattern and Atomic Force Microscope respectively. The band gap of Au doped
CuO is about 1.95 eV. The amount of zeta potential is -54 mV, its indicating that the negatively
charged of Au: CuO nanocomposite in deionized water and the colloid is good stability against aggregation. Surface morphology of Au:CuO nanocomposite show a large number of particles have diameter about 55nm. Au: CuO nanocomposite deposited on porous silicon by drop casting technique for preparation
of silicon photodetector, the electrical properties prove that band gap alignment between Au: CuO nanocomposite and PS facilitates the electron transfer and further increases the photoresponsitivity and Quantum efficiency.