Carrier density

from Wikipedia, the free encyclopedia

In physics, the charge carrier density is the number of charge carriers that are present in a certain volume ( unit m −3 ). It is an important parameter for describing electrical conductivity and all associated processes. It should not be confused with the charge density , which indicates the amount of charge per volume (in coulomb · m −3 ).

The carrier density is a particle density , i.e. i.e., like any density , it can be location-dependent:

and the integration over a volume provides the number of charge carriers in this volume:

Is the charge carrier density independent of location :

the above formula is simplified to

See also

Web links