What are two types of pn junction?

Different types of PN-junction diodes

  • Light Emitting Diode (LED) Very much used in a dancing light display of music systems and information boards on railway stations.
  • Photodiode. A PN junction diode made of photosensitive semiconductor is called a photodiode.
  • Solar Cell.
  • Zener Diode.

What are the characteristics of pn junction diode?

V-I Characteristics of P-N Junction Diode

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

How is pn junction joined?

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 principle of pn junction?

A pn junction diode is a two terminal single crystal semiconductor device whose one side is doped with acceptors and other side by donors. Doping with acceptor creates p type semiconductor while doping with donors produces n type. Thus a pn junction is formed in diode.

Why pn junction is called a diode?

Why is p-n-junction is also called a junction diode? Solution : A p-n-junction allows a large current to flow through it when forward biased and it offers a high resistance when reverse biased. The unidirectional property is similar to that of vacuum diode. Hence, p-n-junction is also called a junction diode.

What is the thickness of pn junction?

When P- type semiconductor is mixed with N – type semiconductor, PN – junction is formed. There is very small region { which is in order of micro metre } . This region is known as depletion region. so, the thickness of PN− junction { depletion region } is in order of 10−6m.

What is barrier field?

The electric fieldformed in the depletion region acts as a barrier. External energy must be applied to get the electrons to move across the barrier of the electric field. The potential difference required to move the electrons through the electricfield is called the barrier potential.