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In the depletion region of a diode
A. there are no mobile charges
B. equal number of holes and electrons exist, making the region neutral.
C. recombination of holes and electrons has taken place.
D. immobile charged ions exist.

Answers (1)

The answer is the option (a, b, d)

The concentration of charge carriers in N-region and P-region is different. Therefore, due to diffusion, the neutrality of both p-type and n-type semiconductor is disturbed. Hence, a layer of negatively charged ions appears at the p junction while positive ions at a junction in N-crystal.

The thickness of layer (depletion) is 1 micron = 10-6 m.

Width of depletion layer ∞  1/Dopping

And the depletion layer is directly proportional to the temperature.

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