Ete411 Lec12
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ETE411 :: Lec12 Dr. Mashiur Rahman
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Transcript of Ete411 Lec12
What we will learn today?
• The pn Junction Diode.
– Zero bias, reverse bias, forward bias
– Calculate the minority carrier diffusion current density at the edge of the space charge region.
– Current voltage characteristics with a forward-bias voltage.
Boundary Condition
Calculate the minority carrier diffusion current density at the edge of the space charge region.
kT
eVnn a
pp exp0
kT
eVpp a
nn exp0
Minority carrier electron concentration in the p region
Minority carrier hole concentration in the n region
Reference : page 271 - 274
Space charge region
Electron and hole current densities through the space charge region of a pn juction