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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 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:
Name the two types of atoms used for doping of Ge/Si.
Answer the following giving reasons:
Impurities are added to intrinsic semiconductors.
What is a semiconductor?
Which materials are common examples of semiconductors?
How does the conductivity of an intrinsic semiconductor compare with that of an extrinsic semiconductor?
What do a moving student and a vacant seat represent when an electron moves into the conduction band?
Why are pure semiconductors not usually used directly in most electronic devices?
