We attempted to control grain boundary propagation in mono-like Si utilizing functional grain boundaries introduced by multi-seeds with specific configurations, and demonstrated that functional grain boundaries can suppress multi-crystallization during growth. The suppression mechanism was studied on the basis of grain boundary character. The grain boundaries nucleate at the crucible surface, which generally leads to multicrystallization, interact with the functional grain boundaries, resulting in a change of their character and configuration. This would increase the yield of the mono-like wafers in an ingot and would enable a large reduction of cost per watt of solar cells.
ASJC Scopus subject areas
- Physics and Astronomy(all)