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Impact of Both Series and Shunt Resistance

In the presence of both series and shunt resistances, the IV curve of the solar cell is given by;

and the circuit diagram of the solar cell is given as;

Parasitic series and shunt resistances in a solar cell circuit.

To combine the effect of both series and shunt resistances, the expression for FFsh, derived above, can be used, with FF0 replaced by FFs 1. The overall equation then becomes;

where FFs is given by;

and by combining the above equations, the net equation for FF becomes;

Rs =

0.13

Rshunt =

101e5

The following calculator determines the effect of Rs and Rsh on the cell fill factor using the same variable definitions as above.

Effect of Both Resistances Calculator