Semiconductor
Semiconductor
Certain solid materials exhibit electrical conductivity that falls between that of conductors and insulators. These materials are called semiconductors. Examples include silicon and germanium.
Types of semiconductors
Types of semiconductors There are two types of semiconductors. (1) Intrinsic Semiconductor (2) Extrinsic Semiconductor (1) Intrinsic semiconductor - A semiconductor with no significant impurities is called an intrinsic semiconductor. (2) Extrinsic Semiconductor - Adding impurities to a pure semiconductor increases its conductivity, resulting in an extrinsic semiconductor. There are also two types of Extrinsic Semiconductor. N-type and P-type N-type semiconductor :- When five-valence impurity atoms, such as arsenic or antimony, are added to a germanium or silicon crystal, the resulting material becomes an n-type semiconductor. In this type of semiconductor, electrons act as the majority charge carriers. P-type semiconductor :- When trivalent impurity atoms, such as aluminum or boron, are added to a germanium or silicon crystal, the resulting material becomes a p-type semiconductor. This type of semiconductor has "holes" as the majority charge carriers. These holes act...
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