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The noncontact crucible (NOC) method was proposed for obtaining Si single bulk crystals with a large diameter and volume using a cast furnace and solar cells with high conversion efficiency and yield. This method has several novel characteristics that originate from its key feature that ingots can be grown inside a Si melt without contact with a crucible wall. Si ingots for solar cells were grown...
Recently, we developed a Na-flux point seed technique for fabrication of large-diameter gallium nitride (GaN) crystals with low dislocation density. It may be possible to further reduce the dislocation density of crystals fabricated by this technique by reducing the point-seed (PS) density, because one dislocation remains on the c face of each grain grown on each point seed. Therefore, in order to...
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