Nano Silicon from Nano Silica Using Natural Resource (Rha) for Solar Cell Fabrication

作者：Venkateswaran Selvaraj; Yuvakkumar Rathinam; Rajendran Venkatachalam^*

来源：Phosphorus, Sulfur, and Silicon and the Related Elements, 2013, 188(9): 1178-1193.

DOI：10.1080/10426507.2012.740106

• Nano silica
• nano silicon
• rice husk ash
• lyophilization
• magnesiothermic reduction
• alkali extraction
• acid precipitation

High purity (approximate to 99%) nano silica with an average particle size of approximate to 100nm was extracted at pH 3 at 650 degrees C from a natural resource, rice husk, using alkaline extraction followed by acid precipitation method. Using nano silica as a precursor, silicon (Si) nanoparticles have been synthesized by high-temperature magnesiothermic reduction method. The prepared sample was characterized by X-ray diffraction, particle size analyzer, Fourier transform infrared spectroscopy, transmission electron microscopy, X-ray fluorescence analyzer, and UV-Vis spectroscopy. The comprehensive characterization studies indicate the pure phase formation of Si and the variation of particle size from 70nm to 100nm for samples synthesized at different sintering temperatures. Moreover, the silicon nanoparticles produced at 850 degrees C have pure phase formation, high purity, and good absorption peaks. The efficiency calculated through IV characteristics is found to be increasing in silicon and ruthenium combination (2.67%), which is better than that achieved from the conventional solar cells. The produced silicon nanoparticles could be applied as an anode material for solar cell fabrication.

• 出版日期2013-9-1