What are the characteristics of pn junction diode?

What are the characteristics of pn junction diode?

When the PN junction diode is under zero bias condition, there is no external voltage applied and this means that the potential barrier at the junction does not allow the flow of current….V-I Characteristics of PN Junction Diode

  • Zero bias.
  • Forward bias.
  • Reverse bias.

What are the three most important diode characteristics?

Electrical Characteristics of Diodes Basic static characteristics of diodes are the forward voltage VF and forward current IF, and the reverse voltage and current VR and IR. The area surrounded by the orange dashed line in the diagram on the right indicates the usable area of rectifying diodes.

What is the unique characteristic of a diode?

There are diverse current scales for forward bias and reverse bias operations. The forward portion of the curve indicates that the diode conducts simply when the P-region is made positive and the N-region negative.

What is the symbol of PN junction diode?

Diode circuit symbol and polarity Like any diode, the PN junction diode has two connections or electrodes. This gives it its name: “di-” meaning two and “-ode” as a shortening of electrode. One electrode of the semiconductor device is termed the anode and the other is termed the cathode.

What is the symbol of P-N junction diode?

How P-N junction is formed?

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. A “built-in” potential Vbi is formed at the junction due to E.

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.

How many types of diodes are there?

Types of Diodes

  • Light Emitting Diode.
  • Laser diode.
  • Avalanche diode.
  • Zener diode.
  • Schottky diode.
  • Photodiode.
  • PN junction diode.

What is forward voltage of a diode?

The forward voltage is the amount of voltage needed to get current to flow across a diode. Another often overlooked fact is that the forward voltage times the current through the diode is the amount of power being dissipated at the diode junction (the junction is simply the place where the P and N materials meet).

Why a pn junction is called a diode?