1.11 P-N Junction
The two type of materials namely p-type and n-type are chemically combined with a special fabrication technique to form a p-n junction. The p-n junction forms a popular semiconductor device called diode. The diode is the basic element of number of electronic circuits. Hence the knowledge of p-n junction and its behaviour is very important in understanding the operation of number of electronic circuits, applications and devices.
Let us study first the features of unbiased p-n junction.