[20a-133-1~8] 16.3 Bulk, thin-film and other silicon-based solar cells

[20a-133-1] Investigation of the correlation between crystal orientations and reflection behaviors of multiclystalline silicon by approaching of data science

〇(M1)Soichiro Kamibeppu¹, Tetsuya Matsumoto², Kentaro Kutsukake³, Hiroaki Kudo², Noritaka Usami¹ (1.Graduate School of Engineering, Nagoya Univ., 2.Graduate School of Informatics, Nagoya Univ., 3.Institutes of Innovation for Future Society, Nagoya Univ.)

Keywords:Data Science, Crystal Orientation, MultiCrystalline Silicon

Currently, multicrystalline Si(mc-Si) solar cells, which are the mainstream of solar cells, takes a long time to measure distribution of crystal orientation. In this research, in order to reduce measurement time of crystal orientations of mc-Si wafers by approaching of data science, we tried to identify the correlation between crystal orientations and the reflection behaviors of crystal grains in optical images. Before taking optical images, treatment was performed such that crystal grains form surface states with different reflectance for each crystal orientation. As a result of taking the optical images under different lighting conditions, reflection behaviors had features for each crystal orientation.