PN Junction Diode Characteristics Apparatus – 2 Meters

A PN junction diode is a semiconductor device made by joining together two types of semiconductors, typically n-type and p-type. The p-type semiconductor contains holes (or positive charges) while the n-type semiconductor contains free electrons (or negative charges). When the two types of semiconductors are joined together, the free electrons from the n-type semiconductor move across the junction and fill the holes in the p-type semiconductor. This results in a depletion region near the junction, where there are no free charges.