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
Spin-orbit effect An influence that causes atomic energy levels to be split since electrons have intrinsic angular momentum (spin) additionally to their extrinsic orbital angul



after 1sec of projectile makes an angle of 45 with the horizontal after another 1 sec travelling horizontally find magnitude of initial velocity and angle of projection

indicate the process of heat exchange that does not depend on temperature difference between human skin and enviroment a: convection b: evaporation c: radiation d: conduction

Hello, As a part of a school assignment, I need to conduct a Q & A with an expert in a field of my choosing. The field I have chosen is the "physics of rollercoasters". If you wo

Q. Show the linked representation of the graph.                                                            Ans: The linked representation of given graph is:

An object is thrown at 25 m/s at 39 degrees above the horizontal from a 40m tall cliff. How long is it in the air?

applications of statically induced emf and dynamically induced emf