A p-n junction diode is
a basic semiconductor device that controls the flow of electric current in a circuit
. It has a positive (p) side and a negative (n) side. … To make a p-n junction diode, a different impurity is added to each side of a silicon semiconductor to change how many extra holes or electrons are present.
What is pn junction in physics?
A p–n junction is
a boundary or interface between two types of semiconductor materials, p-type and n-type
, inside a single crystal of semiconductor.
What is pn junction diode and its diagram?
A p-n junction diode is
two-terminal or two-electrode semiconductor device
, which allows the electric current in only one direction while blocks the electric current in opposite or reverse direction. If the diode is forward biased, it allows the electric current flow.
What is pn junction diode and uses?
The junction which is the p-n junction diode can be used as
a photodiode
, the diode which is sensitive to the light when the configuration of the diode is reverse-biased. It can be used as a solar cell. When the diode is forward-biased then it can be used in LED lighting applications.
What is pn junction diode answer?
V-I- characteristic of p-n junction diode. (i) Under the reverse bias condition the holes of p-side are attracted towards the negative terminal of the battery and the electrons of the n-side are attracted towards the positive terminal of the battery. This increase the depletion layer and the potential barrier.
What is the symbol of Zener diode?
| Pin configuration Anode and cathode | Electronic symbol |
|---|
Why pn junction is called diode?
A diode is called a diode
because it has two distinct electrodes (i.e. terminals)
, called the anode and the cathode. A diode is electrically asymmetric because current can flow freely from the anode to the cathode, but not in the other direction.
What is the main function of PN diode?
A diode (PN junction) in an electrical circuit
allows current to flow more easily in one direction than another
. Forward biasing means putting a voltage across a diode that allows current to flow easily, while reverse biasing means putting a voltage across a diode in the opposite direction.
Is zener a diode?
A Zener diode is
a silicon semiconductor device that permits current to flow in
either a forward or reverse direction. The diode consists of a special, heavily doped p-n junction, designed to conduct in the reverse direction when a certain specified voltage is reached.
What is the purpose of Schottky diode?
Schottky diodes are used for their
low turn-on voltage, fast recovery time and low-loss energy at higher frequencies
. These characteristics make Schottky diodes capable of rectifying a current by facilitating a quick transition from conducting to blocking state.
What are two applications of pn diodes?
- Diodes are used in clamping circuits for DC restoration.
- Diodes are used in clipping circuits for wave shaping.
- Diodes are used in voltage multipliers.
- Diodes are used as switch in digital logic circuits used in computers.
What are the advantage and application of PN junction and zener diode?
Zener diodes operate the same as a PN junction diode when in the forward-bias direction, but it’s typically used for the reverse mode in its applications. That said, zener diodes also
regulate voltage one way (regular)
or both ways (bidirectional).
What are the advantages of PN junction diode?
Benefits or advantages of Diode
➨
It functions as rectifier in order to convert alternating current into direct current
. ➨It is used to suppress voltage spikes. Moreover it is used to protect electronic components which are vulnerable to reverse voltages. ➨It is fast in operation and does not require any warm up time.
Why does reverse current show a sudden increase?
(ii) At
critical voltage or breakdown voltage, there is an enormous breakdown of covalent bonds
, resulting in a rapid increase in the number of charge carriers hence it shows a sudden hike in the current. Zener diode operates following the reverse bias condition in the breakdown regions.
What is knee voltage?
Knee voltage:
The forward voltage at which the flow of the current during the PN Junction of the diode begins increasing very quickly
is commonly known as knee voltage. This voltage is also known as cut-in voltage. … These are generally observed in Zener diodes.
Why is photodiode fabricated?
a Photo diode is fabricated with
a transparent window to allow light to fall on the diode
.b i When a reverse biased photo diode is illuminated with the light of energy greater than the forbidden energy gap Eg the electron-hole pairs are generated in or near the depletion region.
