# What devices use pn junctions?

## What devices use pn junctions?

p–n junctions are elementary “building blocks” of semiconductor electronic devices such as diodes, transistors, solar cells, LEDs, and integrated circuits; they are the active sites where the electronic action of the device takes place.

## What is pn junction device?

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. When the n-type semiconductor is joined with the p-type semiconductor, a p-n junction is formed.

What is the PN junction made of?

semiconductor
P-n junctions are formed by joining n-type and p-type semiconductor materials, as shown below. Since the n-type region has a high electron concentration and the p-type a high hole concentration, electrons diffuse from the n-type side to the p-type side.

### What is the use of PN junction?

Application of PN Junction Diode 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.

### Which of the following devices has a combination of three PN junction diodes?

The thyristor is a four-layer p-n-p-n diode with three p-n junctions in series.

Why pn junction is called a 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.

#### Is PN junction a diode?

A PN Junction Diode is one of the simplest semiconductor devices around, and which has the characteristic of passing current in only one direction only. By applying a negative voltage (reverse bias) results in the free charges being pulled away from the junction resulting in the depletion layer width being increased.

Why PN junction is called diode?

## Which of the following is not related to pn junction?

(D) Electric field channel inductance. The junction capacitance is also referred to as charge storage capacitance and depletion capacitance. It is formed when a P-N junction diode is in reverse biased condition. Here, electric field channel inductance is not associated with P-N junction diodes.

## Which of the following applies to a PN junction diode?

1. Zero Bias – No external voltage potential is applied to the PN junction diode. 2. Reverse Bias – The voltage potential is connected negative, (-ve) to the P-type material and positive, (+ve) to the N-type material across the diode which has the effect of Increasing the PN junction diode’s width.

Is pn junction a diode?