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 (MACE) process, using a silver catalyst. The optical, structural, morphological changes and the antireflection properties of Si nanostructures formed on UMG-Siwafer were analysed. Scanning electron microscopy 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 minutes show strong absorption in the visible spectrum. The minimum and maximum surface reflectance in the visible region was observed for 15 minutes and 60 minutes etched SiNS. Based on the observed results, 15 minutes etched Si with a uniform porous structure has minimum reflectance across the entire silicon UV-visible absorption spectrum, making it worth further investigation as a candidate for use as an antireflection layer in silicon based solar cells.
Pearce, J. (2019). Influence of metal assisted chemical etching time period on mesoporous structure in as-cut upgraded metallurgical grade silicon for solar cell application. Afribary. Retrieved from https://afribary.com/works/influence-of-metal-assisted-chemical-etching-time-period-on-mesoporous-structure-in-as-cut-upgraded-metallurgical-grade-silicon-for-solar-cell-application
Pearce, Joshua "Influence of metal assisted chemical etching time period on mesoporous structure in as-cut upgraded metallurgical grade silicon for solar cell application" Afribary. Afribary, 11 Apr. 2019, https://afribary.com/works/influence-of-metal-assisted-chemical-etching-time-period-on-mesoporous-structure-in-as-cut-upgraded-metallurgical-grade-silicon-for-solar-cell-application. Accessed 05 May. 2024.
Pearce, Joshua . "Influence of metal assisted chemical etching time period on mesoporous structure in as-cut upgraded metallurgical grade silicon for solar cell application". Afribary, Afribary, 11 Apr. 2019. Web. 05 May. 2024. < https://afribary.com/works/influence-of-metal-assisted-chemical-etching-time-period-on-mesoporous-structure-in-as-cut-upgraded-metallurgical-grade-silicon-for-solar-cell-application >.
Pearce, Joshua . "Influence of metal assisted chemical etching time period on mesoporous structure in as-cut upgraded metallurgical grade silicon for solar cell application" Afribary (2019). Accessed May 05, 2024. https://afribary.com/works/influence-of-metal-assisted-chemical-etching-time-period-on-mesoporous-structure-in-as-cut-upgraded-metallurgical-grade-silicon-for-solar-cell-application