At room temperature, the region in a PN junction diode where there are no mobile electrons or holes is called __________________.
Depletion region
In a PN junction at thermal equilibrium:
- Electrons from the n-side diffuse to the p-side and recombine with holes.
- Holes from the p-side diffuse to the n-side and recombine with electrons.
- This leaves a region near the junction depleted of free mobile charge carriers.
- Only immobile ionized donor/acceptor atoms remain, creating the built-in electric field.
This region is called the depletion region (or space charge region).
Similar Questions
Before breakdown, increasing reverse voltage causes reverse saturation current to __________.
The existence of cut-in voltage in a diode is mainly due to the presence of __________.
What is the main disadvantage of a half-wave rectifier?
Consider an abrupt p-n junction under thermal equilibrium. If the acceptor doping concentration (NA) in the p-region is made significantly larger than the donor doping concentration (ND) in the n-region (i.e., NA ≫ ND), how is the depletion region physically distributed?
Under forward-bias conditions, what is the primary mechanism that creates forward current across a PN junction?
Important Questions from PN Junction
In a semiconductor diode, the cut-in voltage is the voltage:
The leakage current in a pn junction is of the order of:
Diode junction breakdowns above 5 V are caused by:
The width of the depletion layer in a P-N junction diode
ln a p-n junction diode the forward current
