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What is a semiconductor? | === What is a semiconductor? === | ||
doped semiconductor | |||
N-type semiconductor Phosphor: charge carrier are the electrons | |||
P-type semiconductor Bore: charge carrier are the holes | |||
P-N junction: depleted of charge carriers | |||
positive charge on the N side | |||
negative charge on the P side | |||
No charge carrier at the junction: it is called the depletion region. | |||
P-N junction allows current to flow in one direction: from the N to P. On the other side (P to N), the depletion region will go wider and the junction will behave like an insulator. | |||
diode | |||
Forward bias: + connected to P and - connected to N: current will flow | |||
Reverse bias: + connected to N and - connected to P: insulator (very small current until depletion zone breakdown) | |||
Latest revision as of 21:07, 7 October 2017
What is a semiconductor?
doped semiconductor
N-type semiconductor Phosphor: charge carrier are the electrons
P-type semiconductor Bore: charge carrier are the holes
P-N junction: depleted of charge carriers
positive charge on the N side
negative charge on the P side
No charge carrier at the junction: it is called the depletion region.
P-N junction allows current to flow in one direction: from the N to P. On the other side (P to N), the depletion region will go wider and the junction will behave like an insulator.
diode
Forward bias: + connected to P and - connected to N: current will flow
Reverse bias: + connected to N and - connected to P: insulator (very small current until depletion zone breakdown)