Development for Fabrication of Refined Silicon Nanoparticles by Transferred Arc Plasma System
Jeong Yeol Kim,
Refining silicon and silicon nanoparticles are an important research area in solar energy research. These are related with solar
cell efficiency. Silicon nanoparticles are also used for thin film solar cell and screen printing technology. We review the synthesis of silicon
nanoparticles and refining of silicon. Refined silicon nanoparticles with minimal boron content were fabricated with transferred arc
plasma equipped with impactor system. To control the chemical reactions leading to the formation of these compounds, H2O was injected
into the shield gas line of the plasma torch. The plasma reactive time for boron removal was evaluated. The reactive time was altered by
changing the flow rate of the shield gas of the plasma torch, fixing the powder feed concentration. The removal ratio of boron was also
evaluated to conform if the boron content in the silicon particles was in the range required for standard solar grade silicon. The sizes and
compositions of the particles were analyzed by Scanning Electron Microscope (SEM), Transmission Electron Microscope (TEM), Inductively
Coupled Plasma (ICP), and X-Ray Diffraction(XRD) analysis.
Keywords: Boron refining, impactor system, nanoparticles, silicon refining, silicon particles, thermal plasma system.
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