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प्रश्न
Two crystals C1 and C2, made of pure silicon, are doped with arsenic and aluminium respectively.
Why is doping of intrinsic semiconductors necessary?
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उत्तर
Doping is necessary to increase the conductivity of semiconductors at normal temperatures.
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संबंधित प्रश्न
Let nh and ne be the number of holes and conduction electrons respectively in a semiconductor. Then ______.
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?
In a pure or intrinsic semiconductor, valence band holes and conduction-band electrons are always ______.
An intrinsic semiconductor has a resistivity of 0.50 Ω m at room temperature. Find the intrinsic carrier concentration if the mobilities of electrons and holes are 0.39 m2V-1S-1 and O.11 m2 v-1S-1 respectively:
Hole is ______.
What is meant by doping of an intrinsic semiconductor?
Name the two types of atoms used for doping of Ge/Si.
Answer the following giving reasons:
Impurities are added to intrinsic semiconductors.
- 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 ______.
