Amorphous Silicon Solar Cells

In 1969, Chittick et al.(1) reported preliminary results on hydrogenated amorphous Si (a-Si:H) and substitutional doping of a-Si:H by P. In 1976, the first p/n junction in a-Si:H was reported by Spear et al.(2) following a detailed and extensive study(3) of substitutionally doped a-Si:H films. This was followed by the fabrication of a-Si:H photovoltaic cells at RCA laboratories.(4,5) The photovoltaic effect was observed in several types of device structure such as p/n, p/i/n, and Schottky barrier junctions as well as heterojunctions.

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