Which of the following is a semiconductor material?

Which of the following is a semiconductor material? Correct Answer Germanium

Semiconductor:

• A semiconductor is a substance that has a resistivity in between conductor and insulator.
• A semiconductor has 4 valance electrons that are C, Si, Ge, Sn, and Pb.
   

Classification of Semiconductor:

Intrinsic Semiconductor:

• An extremely pure form is known as an Intrinsic Semiconductor.
• In intrinsic Semiconductor, even at room temperature, hole electrons pair are created.
• Electric fields applied across the intrinsic semiconductor cause current conduction due to both Holes as well as Electrons.
   

Extrinsic Semiconductor:

• The process of adding impurity to the pure semiconductor is called Doping.
• By means of doping Extrinsic semiconductor is formed.
• Normally, 108 atoms of semiconductor added with 1 atom of impurity.
• Depending upon the types of impurity added, the extrinsic semiconductor is classified into N-type and P-Type semiconductors.
   

​1. N-Type Semiconductor:

This type of semiconductor is formed by added pentavalent impurity.

The current conduction in N-Type semiconductor is predominantly by free electron or it has electron type conductivity.

2. P-Type Semiconductor:

This type of semiconductor is formed by added Trivalent impurity.

The current conduction in the P-Type semiconductor is predominantly by holes or it has hole-type conductivity.