Hot to estimate series and shunt resistance from Jsc Vs Voc plot of Perovskite solar cells? Please provide stepwise calculation for series and shunt resistance values in perovskite solar cells.
Dear Umesh,
The series resistance and shunt resistance can be determined from the dark I-V curve. The shunt resistance is the inverse of the slope at the zero voltage.
The series resistance is determined from over voltage at certain solar cell current I.
The over voltage = V- Vj with V is the total voltage and Vj is the voltage drop across the junction.
Rs= (V-Vj)/ I
I would like that you see my paper at the link: Article A distributed SPICE-model of a solar cell
Best wishes
As Prof. Zekry said, in I-V curve, the tangent slope of Voc is proportional to the reciprocal of series resistance (1/Rs). And the tangent slope of Jsc is proportional to the reciprocal of shunt resistance (1/Rsh).
Dear @ Umesh Nakate
Welcome again,
I may not give a direct answer to your question.
Inn order to give a direct answer to your question let us express the relation between Isc and Voc.
The I-V relation has the form:
I = Iph - Is exp (V-IRs)/nVt - V/Rsh
In case of a shortcircuit one has:
Isc= Iph - Is exp (-IscRs)/nVt (1)
And for open circuit one gets
Iph= Is exp (Voc)/nVt - Voc/Rsh (2)
Substituting eqn (1) in (2) one get finally a relation between Isc and Voc as:
Isc + Is exp (-IscRs)/nVt = Is exp (Voc)/nVt - Voc/Rsh (3)
One can use this equation to extract the Is,n, Rsh and Rs of the solar cells.
You can use some for of curve fitting algoruthms.
Best wishes
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