Question

Why is photodiode used in reverse biased?​

Answer 1

But when photo diode is used in reverse biasthe amount of electrons flowing through the PN junction barrier are proportional to the amount of light incident on the diode. A current is generated in a depletion region due to the absorbed light.

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Answer 2

Answer:

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Explanation:

As fractional change in minority charge carriers is more than the fractional change in majority charge carriers, the variation in reverse saturation current is more prominent.