Question

How heavy doping of both p and n sides of a p-n junction diode results in the electric field of the junction being extremely?

Answer 1

Answer: Heavy doping increases the junction field in two ways.

Explanation: Firstly, heavy doping increases the extent of majority diffusion, thereby leading to higher concentration of uncovered charges on either side of the junction.

Secondly, higher doping concentration causes reduced depletion width.

Both of these effects strengthens the junction field.

Answer 2

Thus high doping means high electric filed in the junction.

Explanation:

• In a P-N junction diode, the current is either forward biased or reverse biased.
• In forward biased the current flows directly while in reversed biased the current flows in the opposite direction.
• When doping is increased in P and N side of the P-N junction, then charge density also increases which results in a high electric field.
• Thus high doping means high electric filed in the junction.