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प्रश्न
Distinguish between 'intrinsic' and 'extrinsic' semiconductors
उत्तर
| Intrinsic Semiconductor | Extrinsic Semiconductor |
| It is a pure semiconductor material with no impurity atoms in it. | It is prepared by doping a small quantity of impurity atoms to the pure semiconductor. |
| The number of free electrons in the conduction band and the number of holes in valence band is exactly equal. | The number of free electrons and holes is never equal. There is an excess of electrons in n-type semiconductors and an excess of holes in p-type semiconductors. |
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संबंधित प्रश्न
The number of silicon atoms per m3 is 5 × 1028. This is doped simultaneously with 5 × 1022 atoms per m3 of Arsenic and 5 × 1020 per m3 atoms of Indium. Calculate the number of electrons and holes. Given that ni= 1.5 × 1016 m−3. Is the material n-type or p-type?
Distinguish between intrinsic and extrinsic semiconductor. (Give any two points).
In n-type semiconductor majority carriers and minority carriers are respectively ______.
In p-type semiconductor, the dopant is ______.
Distinguish between n-type and p-type semiconductors.
In a pure semiconductor crystal of Si, if antimony is added then what type of extrinsic semiconductor is obtained. Draw the energy band diagram of this extrinsic semiconductor so formed.
Name the extrinsic semiconductors formed when pure germanium is doped with a Pentavalent impurity. Draw the energy band diagram of extrinsic semiconductors so formed.
Pieces of copper and of silicon are initially at room temperature. Both are heated to temperature T. The conductivity of ______.
What type of semiconductor is obtained when a crystal of silicon is doped with a trivalent element?
The majority charge carriers in a P-type semiconductor are ______.
