Industrial aspects of semiconductor photochemistry.

The range of commercially viable applications of photovolatic cells based on amorphous, monocrystalline and polycrystalline silicon continues to expand, as cell efficiencies increase and prices, now at $4/peak watt, decrease. In amorphous silicon cells, sharply defined, damage-free interfaces are made by photochemical, rather than plasma, deposition, and laser scribing is used in patterning the layers.