Drift current and diffusion current, Electrical Engineering

Assignment Help:

Drift Current and Diffusion Current :

There are two mechanisms in which electrons and holes move through a semiconductor. One of these is termed as drift and other is diffusion. When the movement of charge carries is under the influence of an applied electric field, the resultant current is termed as drift current. A second type of current, called the diffusion current, also exists in a semiconductor. The diffusion of charge carriers is as a result of a gradient of carrier concentration. In this case concentrations of charge carriers tend to distribute themselves uniformly throughout the semiconductor crystal. This movement continues until all the carries are evenly distribute themselves uniformly throughout the semiconductor crystal. This movement continues until all the carriers are evenly distributed throughout the material. The type of movement of charge carriers is called the diffusion current. Both drift and diffusion occur simultaneously in a semiconductor device.


Related Discussions:- Drift current and diffusion current

Give the properties and application of glass, Give the properties and appli...

Give the properties and application of glass. Glass - It is an inorganic material made by the fusion of various metallic oxides. The properties of glass are as - Glass is

Laplace transform method, Consider the circuit shown in Figure (a) in which...

Consider the circuit shown in Figure (a) in which the switch S has been in position 1 for a long time. Let the switch be changed instantaneously to position 2 at t = 0. Obtain v(t)

Psuedo code, Ask questiIn a right triangle, the square of the length of one...

Ask questiIn a right triangle, the square of the length of one side is equal to the sum of the squares of the lengths of the other two sides. Stephanie has the integer lengths of t

Fast recovery diodes - types of power diodes , Fast  Recovery diodes ...

Fast  Recovery diodes The fast  recovery  diodes low recovery times. These diodes  are manufactured by diffusion. They are used in converter circuits where  the speed  of reco

Write shorte note on carbon, Write shorte note on Carbon. Carbon: The...

Write shorte note on Carbon. Carbon: The rate of commutator wear in electrical machines is greatly decreased by using brushes made of carbon. Carbon (C) is also used in autom

Mesh analysis, i am battling with mesh, node anaalysis, superposition, node...

i am battling with mesh, node anaalysis, superposition, node thevenin and norton equivalents

Control system, model reference adaptive controller for interacting coupled...

model reference adaptive controller for interacting coupled tank

Compute the attenuation, Q. A rectangular air-?lled RG-52/U is made of bras...

Q. A rectangular air-?lled RG-52/U is made of brass (ρ = 3.9 × 10-8 m) and has dimensions a = 22.86 mm and b = 10.16 mm. (a) Determine ¯ Z0(= R0) at the limits of the practica

Amper circuital lw, the plot of amper circuital law by using matlap?

the plot of amper circuital law by using matlap?

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd