A reasonable consistency between experimental data on the ambipolar diffusion length and photoconductivity was demonstrated in the case of steady-state measurements which were carried out on layers of amorphous hydrogenated material. This consistency was based upon the so-called standard defect model for amorphous hydrogenated material. In this model, dangling bonds were taken into account with regard to their amphoteric nature, and were treated as recombination centers. The band tails were taken into account as simple 2-valued defects which acted as traps. The consistency was based upon a particular form of the recombination function which was considered to be suitable for the dangling bonds. It was also based upon a local charge neutrality condition. The experimental data involved power laws of the ambipolar diffusion length and of the photoconductivity (as a function of light intensity) and were obtained for a series of slightly p-doped and n-doped samples; including the undoped case.

J.Hubin, A.V.Shah, E.Sauvain, P.Pipoz: Journal of Applied Physics, 1995, 78[10], 6050-9