A new characterization parameter for hydrogenated amorphous silicon: B (the square of the gradient of the (αh/ω)1/2 versus h/ω plot)

We have found that B (the square of the gradient of (αh/ω)1/2 versus h/ω plot) is dependent on the preparation conditions of a-Si:H films and has a distinct correlation with photoconductivity. B includes information on the tail states and the band edge of extended states of a-Si:H. B is proposed as one of important characterization parameters for a-Si:H as well as photoconductivity.