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Question
Answer the following giving reasons:
Impurities are added to intrinsic semiconductors.
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Solution
To improve a semiconductor's electrical conductivity, impurities are added. Doping is the process of introducing impurities into semiconductors to improve their electrical conductivity; these impurities are referred to as intrinsic semiconductors.
RELATED QUESTIONS
Answer in detail.
Distinguish between intrinsic semiconductors and extrinsic semiconductors.
In a semiconductor, the number of holes and number of free electrons are represented as 'nh' and 'ne' respectively. Which one of the following statements is TRUE for the semiconductor?
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Explain the following term:
Intrinsic semiconductor
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Name the two types of atoms used for doping of Ge/Si.
A pure semiconductor has equal electron and hole concentration of 1016 m-3. Doping by indium increases nh to 5 × 1022 m-3. Then, the value of ne in the doped semiconductor is ______.
- Assertion (A): The resistance of an intrinsic semiconductor decreases with an increase in its temperature.
- Reason (R): The number of conduction electrons as well as hole increase in an intrinsic semiconductor with the rise in its temperature.
Identify the WRONG statement from the following. In an intrinsic semiconductor ______.
