1.9. Summary of Key Concepts

Try these first

1. 1.

   What are semiconductors?

   Hint

   Think about their conductivity range.

2. 2.

   Name two common semiconductor materials.

   Hint

   Consider what is widely used in electronics.

3. 3.

   What type of semiconductor is pure without impurities?

   • Intrinsic
   • Extrinsic
   • Conductive

   Hint

   This is the opposite of doped semiconductors.

4. 4.

   True or False: Higher temperatures lead to decreased conductivity in semiconductors.

   • True
   • False

   Hint

   Consider the relationship between energy and charge carriers.

5. 5.

   A piece of silicon is heated from 0 K to room temperature. Describe how its conductivity will change, including the mechanisms involved.

   Hint

   Focus on how temperature affects the movements of charge carriers.

6. 6.

   In a p-type semiconductor doped with Boron, explain how the energy band diagram will differ from an intrinsic semiconductor.

   Hint

   Consider what happens to the Fermi level with added dopants.