What type of semiconductor is pure silicon, and what happens when a small amount of phosphorus is added to germanium?
Understand the Problem
The question is asking about the properties of pure silicon and the effects of adding phosphorus to germanium, which relates to the field of semiconductor physics.
Answer
1. Intrinsic semiconductor. 2. More free electrons than holes.
The final answer is: 1. Pure silicon is an intrinsic semiconductor. 2. If a small amount of phosphorus is added to germanium, there will be more free electrons than holes.
Answer for screen readers
The final answer is: 1. Pure silicon is an intrinsic semiconductor. 2. If a small amount of phosphorus is added to germanium, there will be more free electrons than holes.
More Information
Pure silicon is an intrinsic semiconductor because it is undoped and relies on its own structure to conduct electricity. Adding phosphorus to germanium adds extra valence electrons, converting it into an n-type semiconductor with more free electrons.
Tips
Don't confuse intrinsic with extrinsic semiconductors. Intrinsic semiconductors are pure, while extrinsic ones are doped with impurities.
Sources
- Doping (semiconductor) - Wikipedia - en.wikipedia.org
- Problem 117 Silicon and germanium are both s... [FREE SOLUTION] - vaia.com
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