Lecture 3 - Semiconductors

Sunday, 16 June 2019

11:55 PM

Any material is either a conductor, an insulator, or a semiconductor…

 

Drift Current

Current flow due to the presence of an electric field in the semiconductor

 

 

 - current density

 - electric field

 - electron charge

 - concentration of holes

 

Diffusion Current

// sort of like osmosis

Current flow due to the concentration gradient of dopants.

 

 

 - diffusion constant for holes (12 cm2/s)

 - diffusion constant for electrons (35 cm2/s)

 

// Thermal Voltage

 

Barrier Voltage

 

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