1. for example, a review is given by Y. Haraakawa in “Current Topics in Photovoltaics” Chap.5, Ed. by J.C. Couts and J. Meakin (1985).
2. for example, “Amorphous Semiconductor — Device and Technology —”, JARECT series, Ed. by Y. Hamakawa, vol.2 (1982), vol.6 (1983) and vol.16 (1984).
3. Y. Hamakawa and Y. Tawada: Int. J. Solar Energy
1 (1982) 125.
4. M. Hirose: EPRI/MITI, NEDO Joint Seminor on a-Si Alloy, Carmel, Calif., July (1985), R.R. Arya, A. Catarano, J. O’dowd, J. Morris and G. Wood: 18th IEEE Photovoltaic Spec. Conf., Las Vegas (1985) 1710, and S. Tsuda and Y. Kuwano: Semiconductor Seminor at Osaka Univ., Feb. 17 (1986) S-3.
5. K. Fujimoto, H. Kawai, H. Okamoto and Y. Hamakawa: Solar Cells
11 (1984) 357.