Experimental and calculated parameters of μc-Si:H solar cells deposited on thermally treated front ZnO:Al layers fitted with Ag fingers of varying density. The curves with triangles represent parameters of cells with an antireflective/retroreflective (AR-RR) foil. Note that finger densities d of 0 <d< 1 make sense only for the simulated data since the experimental parameters extracted here were measured on cells with an active area of 1 × 1 cm². The case d = 0 represents the cell with no Ag fingers.