Distinguish between intrinsic and extrinsic semiconductor. (Give any two points).
|Intrinsic semiconductors||Extrinsic semiconductors|
|1)||Semiconductor in the pure form is known as intrinsic
|The semiconductor, resulting from mixing of impurity in it, is known as extrinsic semiconductor|
|2)||Their conductivity is low||Their conductivity is high.|
|3)||Its electrical conductivity is a
function of temperature alone.
|Its electrical conductivity depends upon the temperature as well as on the quantity of impurity atoms doped in the structure|
|4)||The number of free electrons in conduction band is equal to the number of holes in valence
|In these semiconductors, number of free electrons and number of holes are unequal|
|5)||These are not practically used||These are practically used|
|6)||In these, the Fermi energy level lies in the middle of valence band and conduction band.||In these, the Fermi energy level shifts towards valence or conduction energy band.|
Is there an error in this question or solution?
Solution Distinguish Between Intrinsic and Extrinsic Semiconductor. (Give Any Two Points). Concept: Extrinsic Semiconductor.