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Influence of illumination incidence angle, grain size and grain boundary recombination velocity on the facial solar cell diffusion capacitance

A theoretical 3D study on the diffusion capacitance in a polycrystalline silicon
solar cell under steady multispectral light and various incidence angles is carried out.
The effect of grain size, grain boundary recombination velocity and illumination
incidence angle on the diffusion capacitance is then presented and analyzed ; the dark
capacitance of the cell was also calculated. Finally, considering the junction of the solar
cell as plane capacitor, the efficiency is evaluated. The effect of grain size, grain
boundary recombination velocity and illumination incidence angle have been discussed,
based on the open circuit and short circuit capacitance modes.


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