[5p-PB3-1~26] 16.3 Bulk, thin-film and other silicon-based solar cells

[5p-PB3-1] Iron Contamination near Surface of mc-Silicon Solar Cells Observed by Mössbauer Spectroscopic Microscope

〇Yuji Ino¹, Kazuo Hayakawa¹, Kenichi Yukihira¹, Koichi Moriguchi², Hiroyoshi Soejima¹, Keiko Ogai², Yoshihito Harada², Katsuhiko Shirasawa³, Hidetaka Takato³, Yutaka Yoshida¹ (1.Shizuoka Inst. Sci. & Tech., 2.APCO. Ltd., 3.FREA, AIST)

Keywords:silicon solar cell, iron impurities, Mossbauer effect

We have developed a “Mössbauer Spectroscopic Microscope (MSM)” in order to investigate the Fe impurities in 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 using the Mössbauer effect by focused gamma-rays. In this presentation, we show the results of MSM by the improved microchannel plate for the multi-crystalline (mc) Si solar cell which is not intentionally iron contaminated.