Question

The current of the forward bias is known to be more than the current in the reverse bias. what is the reason to operate the photodiode in Reverse bias ​

Answer 1

Answer:

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Answer 2

Answer:

The current in the forward bias due to majority carriers where is current in the reverse bias is due to minority carriers. So the current in forward bias is more than current in Reverse bias.

On illumination of photodiodes with light, the fractional change in the majority carriers would be much less than that in minority carriers. It implies that frictional change due to light on minority carriers dominated reverse bias current in more easily measurable and frictional change in forward bias current. So, photodiodes are operated in Reverse bias condition.