[B-1-3] Epitaxial Solar Cells on Refined Metallurgical-Grade Silicon T. Warabisako, T. Saitoh, S. Matsubara, N. Nakamura, H. Itoh, T. Tokuyama (1.Central Research Laboratory, Hitachi Ltd.) https://doi.org/10.7567/SSDM.1978.B-1-3