A pn junction is said to be formed only when a bonding force is created between the p type and n type semiconductor. A built in potential v bi is formed at the junction due to e. How Is A Depletion Layer Formed In A Pn Junction Diode Quora Applying The Basic Equations To A Pn Junction Pveducation 4 Pn And Metal Semiconductor Junctions Electrical I have developed a second chapter on the series which explains the characteristics of pn junction diode. Pn junction formation animation . However if the diodes terminals are shorted together a few holes majority carriers in the p type material with enough energy to overcome the potential barrier will move. Une diode animation forward bias reverse bias diode working animation forward bias diode animation forward bias pn junction diode animation forward biased diode animation freewheeling diode animation gunn diode an