We investigated the relationship between the formation of small grains and the distribution of precipitates such as Si3 N4 and SiON in a multicrystalline silicon ingot grown by the unidirectional solidification method. Si3 N4 precipitates were mainly observed inside the small grain region, while SiON was mainly precipitated outside the small grain region. SiON started to precipitate before the formation of Si3 N4 precipitates. Therefore, precipitation of SiON before precipitation of Si3 N4 is a candidate in the formation of small grains.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Renewable Energy, Sustainability and the Environment
- Surfaces, Coatings and Films
- Materials Chemistry