Solid State Devices

Intrinsic Material: The material in which the electron and the hole concentration are same, is known as intrinsic material. Electron concentration, n o = Hole concentration, p o Electron concentration, n i = Hole concentration, p i Extrinsic Material: The carrier concentration (no & po) are not same i.e. they differes from intrinsic concentration (ni & pi), is known as extrinsic material. Electron concentration, n o ≠ Hole concentration, p o Electron concentration, n i ≠ Hole concentration, p i Also n i ≠ n o and p o ≠ n i