The advantages of a P – n junction diode are:
- It is much smaller
- It needs only smaller P.d to operate in the radio receiver
- It is cheaper
- It requires no time to warm up to produce the current carriers since it is a semiconductor
- It can be operated with low voltage source
- It is strong and not easily destroyed;
The disadvantage of P-n junction:
- It is a non-ohmic conductor;
- When polarized, only a very small current flows