Experimental and theoretical studies of high efficiency a-Si:F:H MIS solar cells

Current-voltage characteristics and efficiency of a-Si:F:H solar cells are calculated based on the absorption coefficient and density of localized states in the gap. Efficiency is computed as a function of the quasi-Fermi level position, effective barrier height and the minimum density of states in the gap. The results which are in agreement with the experimental data (6.3% efficiency has been reported for a-Si:F:H cells) indicate that the efficiency may be substantially enhanced by increasing the absorption coefficient and decreasing the minimum density of the localized states.