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What are intrinsic semiconductor?...

What are intrinsic semiconductor?

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A semiconductor in its pure form without impurity is called an intrinsic semiconductor. In intrinsic semiconductors, the number of electrons in the conduction band is equal to the number of holes in the valence band.
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Knowledge Check

  • By adding ............. impurity in intrinsic semi conductor p type semiconductor is made. Charge of these p type semiconductor is .........

    A
    Trivalent , positive
    B
    Pentaralent , neutral
    C
    Pentavalent , positive
    D
    Trivalent , negative

  • The probability of electrons to be found in the conduction band of an intrinsic semiconductor at a finite temperature

    A
    increase exponentially with increasing band gap
    B
    decrease exponentially with increasing band gap
    C
    decreases with increasing temperature
    D
    is independent of the temperature and the band gap

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    The conductivity of an intrinsic semiconductor depends on temperature as (sigma)=(sigma_0)e^(-Delta E//2kT), where (sigma_0) is a constant. Find the temperature at which the conductivity of an intrinsic germanium semiconductor will be double of its value at T=300 K .Assume that the gap for germanium is 0.650 eV and remains constant as the temperature is increased.

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