Forward bias occurs when a voltage is applied across the solar cell such that the electric field formed by the P-N junction is decreased. It eases carrier diffusion across the depletion region, and leads to increased diffusion current.

When a pn junction diode is forward bias?

During forward bias of pn junction diode, we are aware of the fact that the p type semiconductor is connected to the positive terminal and the n type semiconductor is connected to the negative terminal. This causes the holes as well as the electrons to migrate towards the junction from the p and n regions respectively.

When PN junction is forward biased the current in junction?

A forward-biased PN junction conducts a current once the barrier voltage is overcome. The external applied potential forces majority carriers toward the junction where recombination takes place, allowing current flow. A reverse-biased PN junction conducts almost no current.