Question

With what considerations in view, a photodiode is fabricated? Eventhough the current in the forward bias is known to be more than in the reverse bias, yet the photodiode works in reverse bias. What is the reason?

Answer 1

It is fabricated from photosensitive semicoductor.

The fractional change due to photo effect on the minority carrier dominated reverse bias current is more easily measurable than the fractional change in majority carrier, so photo diodes are preferable used in reverse bais

Answer 2

$\huge\mathtt{\fbox{\red{Answer}}}$

It is fabricated from photosensitive semicoductor.

The fractional change due to photo effect on the minority carrier dominated reverse bias current is more easily measurable than the fractional change in majority carrier, so photo diodes are preferable used in reverse bais