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Which of the following accounts for the presence of the potential barrier in the depletion layer?(a) Ions(b) Holes(c) Electrons(d) Forbidden bandThis question was addressed to me during a job interview.I want to ask this question from Semiconductor Electronics in chapter Semiconductor Electronics : Materials, Devices and Simple Circuits of Physics – Class 12

Answer»

The correct answer is (a) Ions

Easiest EXPLANATION: The potential barrier in the depletion layer is due to the presence of immobile ions. The acceptor and DONOR atoms will gain negative and POSITIVE CHARGES leading to p-n JUNCTION formation. Hence, acceptor and donor are immobile ions.



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