Intrinsic Semiconductor and Extrinsic Semiconductor

Intrinsic Semiconductor

• The semiconductor material in its purest form is called as intrinsic semi conductor. 
• The electron – hole pairs are created even at room temperature in an intrinsic semiconductor. 

Hole Current

What is hole current?

• The missing electron in the crystal structure is called as hole. 
• The conduction of current due to missing electrons is called as hole current. 

Law of Resistance

Resistance

• It is a defined as property of substance which oppose the flow of current through it. 
• The SI unit of resistance is ohm ( Ω ). 

Compare Silicon and Germanium

Why Silicon is Preferred over Germanium ?

• The silicon and germanium both are semiconductor material. 

However silicon is mostly preferred as semiconductor as compared to germanium due to following reasons.