Question: What Is The Working Principle Of Pn Junction Diode?

What is the PN junction theory?

PN Junction Theory.

As a result, the charge density of the P-type along the junction is filled with negatively charged acceptor ions ( NA ), and the charge density of the N-type along the junction becomes positive.

This charge transfer of electrons and holes across the PN junction is known as diffusion..

What are the applications of diodes?

The application areas of diodes include communication systems as limiters, clippers, gates; computer systems as logic gates, clampers; power supply systems as rectifiers and inverters; television systems as phase detectors, limiters, clampers; radar circuits as gain control circuits, parameter amplifiers, etc.

What are the applications of junction diode?

PN Junction Diode are used in many application like:PN Junction Diodes are mostly used for rectification (Alternative Current to Pulsating DC).They are used as clipper to clip the portion of AC.They are used as clamper to change the reference voltage.They are used as switches in many electronic circuitry.More items…

What is pn junction with diagram?

Definition: A p-n junction is an interface or a boundary between two semiconductor material types, namely the p-type and the n-type, inside a semiconductor. The p-side or the positive side of the semiconductor has an excess of holes and the n-side or the negative side has an excess of electrons.

What is diode in simple words?

The definition of a diode is an electronic device with two transmitting terminals that allows electric current to flow in one direction while blocking current in the opposite direction. An example of a diode is a light-emitting diode, an LED.

What is the working of PN junction diode?

A p–n junction diode allows electric charges to flow in one direction, but not in the opposite direction; negative charges (electrons) can easily flow through the junction from n to p but not from p to n, and the reverse is true for holes.

How pn junction is formed and how diodes work?

P-n junctions are formed by joining n-type and p-type semiconductor materials, as shown below. … However, in a p-n junction, when the electrons and holes move to the other side of the junction, they leave behind exposed charges on dopant atom sites, which are fixed in the crystal lattice and are unable to move.

What is pn junction diode in physics?

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. … The p-n junction, which is formed when the p-type and n-type semiconductors are joined, is called as p-n junction diode.

Why we use pn junction diode?

It can also be used as a solar cell. P-N junction forward bias condition is used in all LED lighting applications. The voltage across the P-N junction biased is used to create Temperature Sensors, and Reference voltages. It is used in many circuits’ rectifiers, varactors for voltage-controlled oscillators.

What are the properties of pn junction?

The PN junction region of a Junction Diode has the following important characteristics: Semiconductors contain two types of mobile charge carriers, “Holes” and “Electrons”. The holes are positively charged while the electrons negatively charged.