1
Q
Carrier transport phenomena
A
Drift
Diffusion
Mobile charge carriers
2
Q
Carrier diffusion
A
Natural process (don’t need external electric field)
It is present when there is a change in charge carrier concentration along the device
3
Q
Drift
A
Movement of charge due to electric field
4
Q
Diffusion
A
Movement of charge due to charge concentration gradient
5
Q
Diffusion current
A
Particles (electrons) flow from a region of high concentration toward a region of low concentration of electrons
6
Q
Jdiffn > 0
A
Jdiffn in +x direction
7
Q
Jdiffn < 0
A
Jdiffn in -x direction
Solid State Electronics
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