Difference between P-type Semiconductor and N-type Semiconductor

Difference between P-type Semiconductor and N-type Semiconductor

Basically a semiconductor is a material which conducts electricity more than an insulator but less than a pure conductor. Their conductivity and other properties are depends upon the type of impurities we are adding and we called it as doping. Both P type and N type semiconductors are externsic type of semiconductors. The net charge on both N-type and P-type semiconductors is zero.

                   P-type Semiconductor                      N-type semiconductor
1) To obtain P-type semiconducto the impurity must be trivalent i.e of group three.

2) In P-type semiconductors the impurity atoms accept the electrons which creates the holes so it is called accepter.

3) In P-type semiconductor the majority carrers are holes and minority carrers are free electrons.

4) The number density of holes is much greater than the number density of electrons.

5) The accepter  impurity level lie above the valance band.

6) In P-type semiconductor the conduction is low.

7) The fermi level is lie near the valance band.

Ex: aluminum is doped with silicon.

 

1)  To obtain N-type semiconducto the impurity must be pentavalent i.e of group five.

2) In N-type semiconductors the impurity atoms add free electrons so it is called donar.

3) In N-type semiconductor the majority carrers are free electrons and minority carrers are holes.

4) The number density of electrons is much greater than the number density of holes.

5) The donar impurity level lie below the conduction band.

6) In N-type semiconductor the conduction is high.

7) The fermi level is lie near the conduction band.

Ex: Phosphorus is doped with silicon

Updated: February 10, 2022 — 6:52 pm

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