he aim of this study is to study the diffusion capacitance’s efficiency of the n+ -p-p + bifacial solar cell. The dependence of the efficiency of the diffusion capacitance on both the excess minority collection region in open circuit and short-circuit operating points of the solar cell has been itemised for varying grain size (g), grain boundary recombination velocity (Sgb), wavelength (8) and illumination mode (front side and both front and rear sides). It is shown that the diffusion capacitance’s efficiency which increases with grain size (g) and both front and rear sides illumination mode and decreases with grain boundary recombination velocity (Sgb) and higher wavelength (8) can be linked to the conversion efficiency of the solar cell.

Bifacial solar cell, diffusion capacitance’s efficiency, grain size, grain boundary recombination, junction and back side recombination velocities