Principle and Working:
Solar cell is also called photovoltaic cell which convert solar energy into electrical energy.The V-I characteristics of a solar cell describes the relation between the current flowing through the cell and the voltage applied across it. The product of open circuit voltage VOC and short circuit current ISC is known as ideal power.
Ideal Power = VOC × ISC
The maximum useful power is the area of the largest rectangle that can be formed under the V-I curve. If V-I are the values of voltage and current under this condition then
maximum useful power = Vm × I m
The ratio of the maximum useful power to ideal power is called the fill factor
fill factor = (Vm × Im ) / (VOC × ISC)
