Question

Give 5 differences between n type and p type semiconductors

Answer 1

P-type Semi-Conductor

# It is an extrinsic semi-conductor which is obtained by doping the impurity atoms of III group of the periodic table to the pure Ge and Si semi-conductor.

# 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 holes density (nh) is much greater than the electrons density (ne) i.e.>> ne.

# 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.

n-type Semi-Conductor

# It is an extrinsic semi-conductor which is obtained by doping the impurity atoms of Vth group of the periodic table to the pure Ge and Si semi-conductor.

# The impurity atoms added, provide extra electrons in the structure and are called donor atoms.

# The electrons are majority carriers and holes are minority carriers.

# The electrons density (ne) is much greater than the hole density (nh) i.e.>> nh.

# The donor energy level is close to the conduction band and for away from the valence band.

# The Fermi-energy level lies in between the donor energy level and conduction band.

Answer 2

Explanation:

Difference between P-type and N-type semiconductor in Tabular Form

BASIS OF DIFFERENCEp TYPE SEMICONDUCTORn TYPE SEMICONDUCTORIn Group of Doping ElementIn P-type semiconductor, III group element is added as doping element.In n-type semiconductor, V group element is added as doping element.According to Nature of Doping Element in semiconductorThe impurity added creates a vacancy of electrons (holes) So it is called as Acceptor Atom.The impurity added provides extra electrons and is known as Donor Atom.Type of impurity addedTrivalent impurity like Al, Ga, In etc. is added.Pentavalent impurity like P, As, Sb, Bi etc. are added.Majority CarriersHere Holes are majority carriersHere Electrons are majority carriersMinority CarriersHere Electrons are minority carriersHere Holes are minority carriersA density of Electrons and HolesThe hole density is much greater than the electron density.

nh >> neThe electron density is much greater than the hole density.

ne >> nhThe energy level in the semiconductorThe acceptor energy level is close to the valence band and away from the conduction band.The donor energy level is close to the conduction band and away from the valence band.Fermi levelFermi level lies between acceptor energy level and the valence band.Fermi level lies between donor energy level and the conduction band.Movement of Majority carriersMajority carriers move from higher to the lower potential.Majority carriers move from lower to the higher potential.

P-type and n-type semiconductor both are extrinsic semiconductors. We can