Properties of semi-conductors, Physics

Their conductivity lies between conductor and insulator. Their resistivity is usually high and temperature coefficient of resistance is always negative. These are materials which are having filled energy bands and small forbidden zones. Moving carriers of electric current are originated due to absorption of thermal radiant or electric energy from external source. At low temperature they become dielectrics. They present a rise in conductivity with rise in temperature because of increase in current carriers and vice-versa. These are materials whose valance electrons are bonded somewhat loosely to their atoms. They require energy less then insulators and more than good conductors to remove an electron from their parent atom. They own a vacant conduction band. Approximately filled valance band. Very low energy gap of 1.2ev separating the two bands.

Posted Date: 7/7/2012 8:53:58 AM | Location : United States







Related Discussions:- Properties of semi-conductors, Assignment Help, Ask Question on Properties of semi-conductors, Get Answer, Expert's Help, Properties of semi-conductors Discussions

Write discussion on Properties of semi-conductors
Your posts are moderated
Related Questions
A two farad and a four farad capacitor are connected in series. What single capacitance is "equivalent" to this combination? A 2-farad and a 4-farad capacitor are connected in

O rdinary glass is a good insulator but is too brittle to be used for anything but scientific instrument part s, accumulator container and for certain other special purposes. It is

Y the charge n voltage. Remain constant ven we connect capacitors in series. N parallel. Respectively??

Hello! I would like to ask if there is a job in Physics which is 24/7 Question Answering/problem solving and if any, I would like to apply for it. Thank You Prerak Dhawan

i need to demonstrate the magnetic properties as a part of my assignment. then how can i do that?

The electrostatic shielding may be found by protecting and enclosing the sensitive instruments inside a hollow conductor due to inside hollow conductors, electric fields is zero.

A 2.0-kg projectile is fired with initial velocity components v0x= 30m/s and v0y= 40m/s from a point on the earth's surface. Neglect any effects due to air resistance. What is the

REST: A body is said to be at rest if it does not alter its position with respect to its surroundings.

What do you mean by lateral shift? Derive a mathematical expression for lateral shift produced by a parallel sided glass slab for oblique incidence.

what is magnitisam?how north pole and south pole takes part in it?