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.
