alleryDoping silicon with boron, which has three valence electrons, gives:
An-type silicon
BPure silicon
CMetallic silicon
Dp-type silicon
Answer & Solution
Correct answer: D. p-type silicon
1. Boron is a trivalent impurity.
2. It leaves one bond short, creating a hole.
3. Trivalent doping gives p-type.
_Source: syllabus Physics Part II, Chapter 14, Semiconductor Electronics._
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