Semiconductor Electronics Materials Devices and Simple Circuits - Result Question 46
47. To obtain a $p$-type germanium semiconductor, it must be doped with
(a) arsenic
(b) antimony
(c) indium
(d) phosphorus
[1997]
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Answer:
Correct Answer: 47. (c)
Solution:
- (c) p-type germanium semiconductor is formed when it is doped with a trivalent impurity atom.
Doping is the process of addition of impurity. When pure or intrinsie semiconductor is mixed with small amounts of certain specific impurities with valency different from that of the parent material the number of mobile electrons/holes transtically changes.
