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Drift And Diffusion Currents
The flow of charge or Currents through the semiconductor material are of two types
1) Drift Current
2) Diffusion Current
1) Drift Current
When an electric field applied across the semiconductor ,then the charge carriers will attain the some velocity called as drift velocity(Vd) Which is equal to the product of the mobility of the charge carriers and the applied electric field intensity [E]. The Holes Moves To wards the Negative Terminal And The Electrons Move Toward The Positive Terminal. this combined effet is known as the drift current.
The drift current may be defined as the flow of electric current in the presence of the electric field .
The drift bcurennt density (Jn) is given by
2) Diffusion Current :
Because Of My Exams....Now I am Back With
Drift And Diffusion Currents
The flow of charge or Currents through the semiconductor material are of two types
1) Drift Current
2) Diffusion Current
1) Drift Current
When an electric field applied across the semiconductor ,then the charge carriers will attain the some velocity called as drift velocity(Vd) Which is equal to the product of the mobility of the charge carriers and the applied electric field intensity [E]. The Holes Moves To wards the Negative Terminal And The Electrons Move Toward The Positive Terminal. this combined effet is known as the drift current.
The drift current may be defined as the flow of electric current in the presence of the electric field .
The drift bcurennt density (Jn) is given by
2) Diffusion Current :
- It is possible to flow the current in the semiconductor in the obsence of the electric supply
- In a region The HOles or electrons any one is greater it will recombined with the another pair in the other region
- then the the electron or hole moves this movement of charge is called as the diffusion current
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