1.5. Extrinsic Semiconductors

Try these first

1. 1.

   What is an extrinsic semiconductor?

   Hint

   Think about how impurities affect conductivity.

2. 2.

   Name a donor impurity used in n-type semiconductors.

   Hint

   It has five valence electrons.

3. 3.

   What type of semiconductor is created when phosphorus is added to silicon?

   • N-Type
   • P-Type
   • Intrinsic

   Hint

   Think about which charge carriers are dominant.

4. 4.

   True or False: In a p-type semiconductor, electrons are the majority carriers.

   • True
   • False

   Hint

   Consider what 'p-type' implies about charge carriers.

5. 5.

   If you have a silicon crystal doped with both phosphorus and boron, how would you analyze its electrical characteristics? What challenges might arise?

   Hint

   Consider the implications of mixed doping types.

6. 6.

   Explain how temperature affects the conductivity of extrinsic semiconductors differently from intrinsic semiconductors.

   Hint

   Think about how impurities influence thermal behavior.