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How does a pn junction diode work?
PN junction is formed in a single crystal by joining two N-type and P-type semiconductors. When the junction diode is biased in the reverse direction, the majority charge carriers are attracted by the respective terminals away from the PN junction, thus avoiding the diffusion of electrons and holes at the junction.
What is pn junction explain its working?
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 step junction in pn junction diode?
PN junction diode is one of the fundamental elements in electronics. In a step graded PN junction diode, the concentration of dopants both, in the N side and the P side are uniform up to the junction. But in a linearly graded junction, the doping concentration varies almost linearly with the distance from the junction.
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.
What is the main function of a pn junction?
A diode (PN junction) in an electrical circuit allows current to flow more easily in one direction than another. Forward biasing means putting a voltage across a diode that allows current to flow easily, while reverse biasing means putting a voltage across a diode in the opposite direction.
What are the advantages of pn junction diode?
Following are the benefits or advantages of Diode: ➨It functions as rectifier in order to convert alternating current into direct current. ➨It is used to suppress voltage spikes. Moreover it is used to protect electronic components which are vulnerable to reverse voltages.
What are the applications of a PN junction diode?
Applications of PN Junction Diode 1 p-n junction diode can be used as a photodiode as the diode is sensitive to the light when the configuration of the diode is reverse-biased. 2 It can be used as a solar cell. 3 When the diode is forward-biased, it can be used in LED lighting applications.
How is a battery connected to a diode?
The positive terminal of the battery is connected to the anode of a diode and negative terminal to the cathode. When battery is not connected, there is a barrier potential of 0.3 V for Silicon and 0.7 V for Germanium across the across the P-N junction of a diode.
What should I know about the formation of a PN junction?
Before explaining the formation of a PN junction, I would like to remind you about the real basic stuff :- Classification into Metals,Semiconductors and Insulators.
How is a silicon wafer converted to a PN junction?
This means, we first convert a silicon (pure, intrinsic) wafer to a p-type semiconductor by doping it with a trivalent impurity (Boron or Indium) on one side. Then we dope this p-type semiconductor with a pentavalent impurity (Phosphorous or Arsenic or Antimony ) to form an n-type region on the same wafer.