P-n junction, Electrical Engineering

P-N Junction 

A p-n junction is made by joining P-type and N-type semiconductors together in extremely close contact. The word junction consider to the boundary interface in which the 2 regions of the semiconductor meet. If they were constructed of two separate pieces this would bring in a grain boundary, thus p-n junctions are formed in a single crystal of semiconductor by doping, for instance by ion implantation, diffusion of dopants, or through epitaxy (growing a layer of crystal doped with one kind of dopant on top of a layer of crystal doped with another sort of dopant).

P-N junctions are elementary "building blocks" of approximately all semiconductor electronic devices like diodes, transistors, solar cells, LEDs, and integrated circuits; they are the active sites in which the electronic action of the device occurs. For instance, a common sort of transistor, the bipolar junction transistor, contains two p-n junctions in series, in the make n-p-n or p-n-p.

493_P-N Junction.png

Generally, p-n junctions are manufactured from a single crystal with dissimilar dopant concentrations diffused across it. Forming a semiconductor from two separate pieces of material would introduce a grain boundary among the semiconductors that severely inhibits its utility by scattering the electrons and holes. Though, in the case of solar cells, polycrystalline silicon is frequently employed to reduce expense, despite the lower efficiency.

Posted Date: 1/11/2013 12:01:10 AM | Location : United States







Related Discussions:- P-n junction, Assignment Help, Ask Question on P-n junction, Get Answer, Expert's Help, P-n junction Discussions

Write discussion on P-n junction
Your posts are moderated
Related Questions
Determine the active - reactive and apparent power: In the given circuit, determine the active, reactive and apparent power. Figure Solution  The inductive

what is strain gage

OBJECTIVES OF NEP: Access to Electricity for whole households within the next five years. Availability of Power to be ensured to meet the demand through 2012. Pe


what is tha lapelace transform of t^n please give me the answer i am so worried about iy???

Discuss the various types of memory devices that you are familiar with. All of the memory utilized as main store in a modern computer is implemented like semiconductors fabrica

What is meant by polling? In polling schemes, a set of address lines is driven by the controller to address every of the masters in sequence. When a bus request is received fro

Q. Write short note on a negative clamper ?   A circuit which places the negative peak of a signal at a desired level is known as a negative clamper (1). During the

Q. A current of 65 A is measured with an analog ammeter having a probable error of ± 0.5% of full scale of 100 A. Find the maximum probable percentage error in the measurement.

Power Distribution: - The Energy Conservation Act, 2001, gives the legal framework, institutional arrangement and a regulatory mechanism at the Central and State level to emba