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Hydrogen Incorporation in A-Si:H: Temperature and Doping Type Dependence

  • M.J.M. Pruppers (a1), K.M.H. Maessen (a1), F.H.P.M. Habraken (a1), J. Bezemer (a1) and W.F. Van Der Weg (a1)...

Abstract

Phosphorus, boron and compensation doped hydrogenated amorphous silicon films were deposited in a glow discharge at different substrate temperatures in the range 50–330°C. Gas phase doping levels were 1%. At the lower temperatures the hydrogen concentration in the B doped and compensated doped films is larger than in the P and undoped films. For higher deposition temperatures the H concentration of the B doped films appeared to be smaller than in the other materials. The difference in hydrogen content of the doped and undoped material, deposited at various temperatures, is considered as a function of the measured activation energy for conduction in these films. This difference varies in much the same way with the activation energy as the hydrogen content in films deposited at one substrate temperature, but with varying gas phase dopant levels. This represents strong evidence that, apart from the deposition temperature, the hydrogen concentration in glow discharge a-Si:H is determined by the position of the Fermi level.

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Hydrogen Incorporation in A-Si:H: Temperature and Doping Type Dependence

  • M.J.M. Pruppers (a1), K.M.H. Maessen (a1), F.H.P.M. Habraken (a1), J. Bezemer (a1) and W.F. Van Der Weg (a1)...

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