Self-Organized Structuring of the Surface of a Metal–Semiconductor Composite by Femtosecond Laser Processing
Keywords:solar cell, thin film, nanoparticle, laser-induced periodic surface structure, surface plasmon
Peculiarities of the laser treatment of a composite consisting of a thin film of a metal (gold) on the surface of a semiconductor substrate [silicon (100)] have been studied. Micro- and nanostructurings of the metal-semiconductor composite sample have been achieved by the irradiation of its initial surface with a Ti : sapphire femtosecond laser. Laser ablation leads to the patterning of the surface of the composite with laser-induced periodic surface structures (LIPSS) and the formation of semiconductor nanohills, metal nanoparticles, and/or nanowires on the top of hills. The presence of some nanoscale surface features is confirmed by a low-frequency shift of the silicon phonon band in Raman spectra. Prepared microstructured surface barrier solar cells are characterized by means of scanning electron microscopy, optical spectroscopy, and photoelectric measurements.
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<a href="https://doi.org/10.1103/PhysRevB.95.054305 ">https://doi.org/10.1103/PhysRevB.95.054305 </a></li>
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