A piece of intrinsic (pure) silicon at room temperature has, at any instant, a number of conduction-band (free) electrons bthat are unattached to any atom and are essentially drifting randomly throughout the material. Also, and equal number of holes are created in the valence band when these electrons jump into the conductance band.
All of them it depends strictly on the application
Semiconductors have a resistivity value between that of a conductor and an insulator.
http://en.wikipedia.org/wiki/Semi_conductor
Semiconductors might sound somewhat 'inferior' in comparison to 'conductors', but they are - due to their unique properties - indispensable in modern electronics. Semiconductors, generally, make it easily possible to control the direction and flow of electric current which is the basis of most modern electronic device.
Organic semiconductors are inexpensive hence easy to fabricate device out of them, they can be modulated in various desirable way like in electronic properties of band gap, can be made transparent which is good for Optical electrodes, flexible. Because of these modulation they are finding their application in wide varieties of area. Of course they are very attractive choice for researchers now a days.
No. Iron is a conductor, as are the majority of other metals. Semiconductors would be like silicon and graphite in the form or carbon nanotubes. Metals = ConductorsSome metalloids=semiconductors.
Germenium and silicon are the examples of Semiconductors.
The purpose of semiconductors is to control the amount of conduction, not the amount of insulation.
Sadao Adachi has written: 'Optical constants of crystalline and amorphous semiconductors' -- subject(s): Optical properties, Semiconductors 'Handbook of Physical Properties of Semiconductors'
Semiconductors.
J. Tauc has written: 'Photo and thermoelectric effects in semiconductors' -- subject(s): Crystals, Electric properties, Photoelectricity, Semiconductors, Thermoelectricity 'Amorphous and liquid semiconductors' -- subject(s): Amorphous semiconductors, Liquid semiconductors
The properties that are desirable in a computer will depend on what you need it for. If you want it to play games, you will want a good video and audio card.
Marvin L. Cohen has written: 'Electronic structure and optical properties of semiconductors' -- subject(s): Electronic structure, Energy-band theory of solids, Optical properties, Semiconductors
A. A. Borshch has written: 'Refractive nonlinearity of wide-band semiconductors and applications' -- subject(s): Optical properties, Semiconductor lasers, Semiconductors
Keiji Tanaka has written: 'Amorphous chalcogenide semiconductors and related materials' -- subject(s): Chalcogenides, Semiconductors, Materials, Electric properties
Alexander V Kolobov is a Russian author known for writing science fiction novels. Some of his notable works include "Psi Factor" and "Zone of Alienation." His writing often explores themes of technology, society, and the future.
They can be used as a base material for computer chips
Microchips are generally manufactured using photo-lithography to control the placement of semiconductors. The semiconductors are made by doping the metal to alter its electrical properties
The operating temperature of a semiconductor is the temperature at which a semiconductors exhibits the properties of a normal conductor.
A metalloid has some properties of both metals and nonmetals, and some, like silicon and germanium are semiconductors.