Study and Fabrication of Au nanoparticles on Porous Silicon

Articles in Press

Document Type : Research Paper

Authors

1 Department of physics,faculty of science, university of Mosul

2 Department of physics,faculty of Education for pure science , university of Mosul

3 Department of physics,faculty of science,university of Mosul

Abstract

In this study, we prepared Au nanoparticles using high power laser ablation with different laser energy (600,750 and 900 mJ). Moreover, we prepared p-type and
n-type PSi samples using electrochemical etching technique. Then we deposited the Au nanoparticles on PSi to created AuNPs/PSi materials. Photoluminescence,
UV-Vis spectroscopy and I-V measurements were all used to characterize the prepared samples. The AuNPs/PSi transmission spectra decrease with laser ablation energy due to the surface plasmon excitation improved the electromagnetic field near the Au nanoparticles. Furthermore, PL spectra peak exhibited a redshift with increasing laser energy especially for AuNPs on n-type PSi due to the quantum confinement effect. In addition, the electrical properties of AuNPs/PSi structure revealed that the current of forward bias increases with increasing laser energy due to reduction in the energy gap. Finally, Au nanoparticles on PSi showed a high quality properties making it an attractive material in electronic devices.
Keywords: Au nanoparticles, laser ablation, PSi, Photoluminescence, UV-vis Spectroscopy.

Keywords

Journal of Nanostructures

Articles in Press, Accepted Manuscript
Available Online from 30 July 2023

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