Distinguish between n-type and p-type semi-conductors on the basis of energy band diagrams Compare their conductivities at absolute zero - Physics - Semiconductor Electronics Materials Devices And Simple Circuits

Question

Distinguish between n-type and p-type semi-conductors on the
basis of energy band diagrams Compare their conductivities at
absolute zero temperature and at room temperature

Shobhit Mittal · Accepted Answer

Dear Student , N type : The impurity atoms added, provide extra electrons in the structure and are called donor atoms The donor energy level is close to the conduction band and for away from the valence band This small energy gap is only 0 045 eV and no of electron increases in conduction band As we can see in below diagram

P type: â€‹The impurity atoms added, create vaccines of electrons (i e holes) in the structure and are called acceptor atoms The holes are majority carriers and electrons are minority carriers The acceptor energy level is close to the Valence band and for away from the Conduction band The Fermi-energy level lies in between the acceptor energy level and valence band we can see the energy level from below diagram

The electrical conductivity of a semiconductor at absolute zero of temperature is zero For equal doping, an n-type semi conductor will have more conductivity than a p-type semiconductor, at room temperature Regards

Distinguish between n-type and p-type semi-conductors on the basis of energy band diagrams. Compare their conductivities at absolute zero temperature and at room temperature.