[15p-211-1~18] 16.3 Bulk, thin-film and other silicon-based solar cells

[15p-211-2] The Observation of Fe Impurities and the Crystal Defects in mc-Si Solar Cells by Mössbauer Spectroscopic Microscope

〇Yuji Ino¹, Hiroyoshi Soejima¹, Kazuo Hayakawa¹, Kenichi Yukihira¹, Hirotaka Fujita¹, Tomio Watanabe¹, Koichi Moriguchi², Keiko Ogai², Yoshihito Harada², Yutaka Yoshida¹ (1.Shizuoka Inst. Sci. & Tech., 2.APCO. Ltd.)

Keywords:Silicon solar cells, Iron impurities, Mossbauer spectroscopy

We have been developing a “Mössbauer Spectroscopic Microscope (MSM)” in order to investigate the Fe impurities in multi-crystalline (mc) Si solar cells. This MSM can provide information on the charge states and the lattice positions of ⁵⁷Fe impurities in Si solar cells, and show the distribution for each state of ⁵⁷Fe . In this presentation, we will show the the results of MSM, EBSD, and EBIC in the same area, and consider the effect of grain boundaries for Fe distribution.