2.1. Introduction to PN Junction

Try these first

1. 1.

   What two types of semiconductors form a PN junction?

   Hint

   Think about the charge carriers in each type.

2. 2.

   What is the main function of a PN junction?

   Hint

   What type of devices use this feature?

3. 3.

   What forms the PN junction?

   • p-type and p-type
   • n-type and n-type
   • p-type and n-type

   Hint

   Focus on the types of semiconductors.

4. 4.

   True or False: A depletion region is present in a PN junction.

   • True
   • False

   Hint

   Consider the properties of the junction.

5. 5.

   Design a simple experiment to demonstrate how a PN junction diode works. Explain what materials would be used and what observations you expect.

   Hint

   Consider the direction of current flow and the voltage necessary for the diode to conduct.

6. 6.

   Compare the characteristics of a PN junction under forward bias versus reverse bias in terms of current flow and depletion width.

   Hint

   How does the biasing affect the charge carriers?