Abstract
β-Si3N4 particles are thought to be nucleation sites for silicon in multicrystalline silicon (mc-Si) ingots for PV applications. The orientation relationship (OR) between Si and β-Si3N4 has been investigated by transmission electron microscopy (TEM). The following OR was found by analyzing diffraction patterns from a site specific sample prepared by focused ion beam (FIB)0001β-Si3N4‖11¯1Si4¯51¯0β-Si3N4‖011SiThe β-Si3N4 particle was identified as a likely nucleation site based on the grain boundaries (GB) extending from it. It was shown that these GBs were Σ3 boundaries. The nucleation process was discussed as a source for formation of twins in mc-Si.
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