what is open circuit voltage in a solar cell
Theory of solar cells When the cell is operated at open circuit, I = 0 and the voltage across the output terminals is defined as the open-circuit voltage. Assuming the shunt resistance is high enough to neglect the final term of the characteristic equation, the open-circuit voltage VOC is:
p–n junction In a pâ€“n junction, without an external applied voltage, an equilibrium condition is reached in which a potential difference is formed across the junction. This potential difference is called built-in potential   V  b i   {\displaystyle V_{\rm {bi}}} .