Solar Grade-Silicon, Ingot, Wafer Technology and ... - Displaybank
Solar Grade-Silicon, Ingot, Wafer Technology and ... - Displaybank
Solar Grade-Silicon, Ingot, Wafer Technology and ... - Displaybank
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<strong>Solar</strong> <strong>Grade</strong>-<strong>Silicon</strong>, <strong>Ingot</strong>, <strong>Wafer</strong> <strong>Technology</strong> <strong>and</strong> Market Trend (2008~2012)<br />
3SiCl 4 + 2H 2 + Si = 4SiHCl 3<br />
This process spills mixture of tetrachlorosilane <strong>and</strong> hydrogen to the<br />
metallurgical silicon within a fluidized reactor usually at 500°C <strong>and</strong> 35 bars <strong>and</strong><br />
obtains trichlorosilane.<br />
Figure 2.10. Interior of Siemens Reactor<br />
The Siemens process has rather poor energy efficiency; it consumes a large<br />
amount of electricity to maintain extraction temperature at higher than 1,000℃<br />
during the process <strong>and</strong> has a great loss in amount of heat while continuously<br />
cooling down interior walls with circulating coolants to prevent Si extractions.<br />
Usually, it loses more than 90% of energy input in exterior cooling walls. The<br />
Siemens methods consumes about 60~150kWh in manufacturing 1 kg of<br />
SoG-Si. Hence, it installs several bars within the Siemens reactor in order to<br />
enhance the low efficiency (refer to figure 2.11).<br />
SAMPLE<br />
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Jan’09