Question

Distinguish between n-type and p-type semiconductors.

Answer 1

S. No.	n-type semiconductors	p-type semiconductors
1.	It is an extrinsic semiconductor obtained by adding a pentavalent impurity to a pure intrinsic semiconductor.	It is also an extrinsic semiconductor obtained by adding a trivalent impurity to a pure intrinsic semiconductor.
2.	The impurity atoms added provide extra free electrons to the crystal lattice and are called donor atoms.	The impurity atoms added create holes in the crystal lattice and are called acceptor atoms because the created holes accept electrons.
3.	The electrons are majority carriers and the holes are minority carriers.	The holes are majority carriers and the electrons are minority carriers.
4.	The electrons concentration is much more than the hole concentration (ne » nh).	The hole concentration is much more than the electron concentration (nh » ne).