What is the contact potential of a P-N junction?

What is the contact potential of a P-N junction?

Thus, an electric field is formed going from the n-side to the p-side and there is a built-in potential, from the p to the n side. This potential is called the junction potential or contact potential.

What is the expression of contact potential?

a difference in electric potentials arising between two bodies that are in contact and in thermo-dynamic equilibrium. The concept of contact potential is most important for solid conductors (metals and semiconductors).

What is the other name of P-N junction?

P-N junction semiconductor diode is also called as p-n junction semiconductor device. In n-type semiconductors, free electrons are the majority charge carriers whereas in p-type semiconductors, holes are the majority charge carriers.

What is junction potential in P-N junction?

Can you measure contact potential?

The contact potential cannot be measured because when contact is made to the junction a potential forms at the contacts which works to cancel the contact potential. The contact potential also separates the bands with the conduction energy bands higher on the p-side.

What is contact potential in Zener diode?

1 V
A zener diode has a contact potential of 1 V in the absence of biasing.

What is built-in potential?

In a p–n junction, without an external applied voltage, an equilibrium condition is reached in which a potential difference forms across the junction. This potential difference is called built-in potential . At the junction, the free electrons in the n-type are attracted to the positive holes in the p-type.

When a close contact in atomic level between AP region and N region is established which of the following is most likely to take place?

When a physical contact between a p-region & n-region is established which of the following is most likely to take place? Explanation: When p & n region come together diffusion takes places & a depletion region is established with opposite charges on both the sides of the junction. 9.

How do the transition region width and contact potential across a PN junction vary with the applied bias voltage?

How do the transition region width and contact potential across a p-n junction vary with the applied bias voltage? When the p-n junction is forward biased , the transition region width is reduced and the contact potential is also reduced with the increase in applied bias voltage.

When used in a circuit the zener diode is always?

both forward and reverse.