Abstract

a-Si films were produced in an rf-GD from SiH 4, SiCl 4/H 2 and SiF 4/H 2 gas mixture with electrical and optical properties which qualify them as a basic material for solar cells. They proved to be doped with Cl and F respectively. The concentration of H and F in a-Si:H,F films, though below 1 %, was high enough to observe values of photoconductivity and photoluminescence comparable to those of a-Si:H and a-Si:H, Cl films. The decay time of photogenerated carriers observed by photoluminescence shows two components, a short one of 0,29 μs (0,23 μs) for a-Si:H,F (a-Si:H) and a longer one of 1,4 μs for a-Si:H,F and a-Si:H.

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