What is p-n junction? How is a p-n junction made? How potential barrier is caused in it.

In forward bias in a p-n junction, the potential barrier

In a p-n junction , numbers of junction are

How does a P-N junction break down?

How is a P-N junction diode fabricated?

In a p-n junction , the barrier potential offers resistance to

When forward bias is applied to a p-n junction, what happens to the potential barrier and the width of depletion region.