Intrinsic and extrinsic semiconductors are two types of semiconductors. Intrinsic semiconductors are pure semiconducting materials without any intentional doping with other elements, while extrinsic semiconductors are semiconductors that have impurities added to them through a process called doping. Intrinsic semiconductors have poor electrical conductivity at room temperature, while extrinsic semiconductors have high electrical conductivity compared to other materials. Extrinsic semiconductors are classified into two types based on the type of doping: n-type semiconductors and p-type semiconductors. The following are the key differences between intrinsic and extrinsic semiconductors:

• Intrinsic semiconductors exist in their purest form at all times, while extrinsic semiconductors are created by doping impurities in pure semiconductors.
• Intrinsic semiconductors have poor electrical conductivity at room temperature, while extrinsic semiconductors have high electrical conductivity compared to other materials.
• The number of electrons equals the number of holes in intrinsic semiconductors, while the numbers are unequal in extrinsic semiconductors.
• Intrinsic semiconductors are solely reliant on temperature, while extrinsic semiconductors are affected by the type and concentration of impurities added.