Question
Download Solution PDFWhat is the meaning of doping a semiconductor?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFCONCEPT:
- Doping: The process of adding impurities to a pure (intrinsic) semiconductor is called doping.
- By doing this, the conductivity of the semiconductor is increased drastically even at room temperatures.
- It is needed because the conductivity of a pure semiconductor like silicon or germanium is very low at room temperatures.
- Doping leads to the formation of extrinsic semiconductors which are of two types: n-type and p-type.
- N-type semiconductors have impurities of elements from Group 5 of the periodic table, hence electrons are the majority charge carriers.
- P-type semiconductors have impurities of elements from Group 3 of the periodic table, hence holes are the majority charge carriers.
EXPLANATION:
- The process of adding impurities is doping. So option 2 is correct.
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