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Cite as Citation reference for the source document. Ragavendran Venkatesan, Jeyanthinath Mayandi, Joshua M. Pearce, Vishnukanthan Venkatachalapathy. Influence of metal assisted chemical etching time period on mesoporous structure in as-cut upgraded metallurgical grade silicon for solar cell application. Journal of Materials Science: Materials in Electronics 30(9), pp 8676–8685 (2019). https://doi.org/10.1007/s10854-019-01191-6 open access

In this work, upgraded metallurgical grade silicon (UMG-Si) wafer was used to fabricate mesoporous nanostructures, as an effective antireflection layer for solar photovoltaic cells. The length of the vertical Si nanostructure (SiNS) arrays was altered by varying the etching time period during metal assisted chemical etching process, using a silver catalyst. The optical, structural, morphological changes and the antireflection properties of Si nanostructures formed on UMG-Siwafer were analysed. SEM and photoluminescence studies indicate that Si nanocrystals are formed on the surface and along the vertical nanowires. The pore size depends on the Ag nanoparticle size distribution. All the samples demonstrated a luminescence band centred around 2.2 eV. From the optical results, samples etched for 45 min show strong absorption in the visible spectrum. The minimum and maximum surface reflectance in the visible region was observed for 15 min and 60 min etched SiNS. Based on the observed results, 15 min etched Si with a uniform porous structure has minimum reflectance across the entire silicon UV–Vis absorption spectrum, making it worth further investigation as a candidate for use as an antireflection layer in silicon based solar cells.

Keywords[edit | edit source]

	 Black silicon; Black Si solar cell; Metal-catalyzed chemical etching; Metal-assisted chemical etching; Micro-texture; Nano-texture; Photovoltaic

See also[edit | edit source]

FA info icon.svg Angle down icon.svg Page data
Authors Joshua M. Pearce
License CC-BY-SA-3.0
Language English (en)
Related 0 subpages, 11 pages link here
Impact 282 page views
Created April 9, 2019 by Joshua M. Pearce
Modified February 23, 2024 by Maintenance script
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