Semiconducting Devices Question 145

Question: Electronic configuration of germanium is 2, 8, 18 and 4. To make it extrinsic semiconductor small quantity of antimony is added

[MP PET 1999]

Options:

A) The material obtained will be N-type germanium in which electrons and holes are equal in number

B) The material obtained will be P-type germanium

C) The material obtained will be N-type germanium which has more electrons than holes at room temperature

D) The material obtained will be N-type germanium which has less electrons than holes at room temperature

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Answer:

Correct Answer: C

Solution:

Antimony is a fifth group impurity and is therefore a donor of electrons.



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