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What are semiconductors?

 


Posted- 1784 days ago
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Semiconductor is a material that has a resistivity value between that of a conductor and an insulator. The conductivity of a semiconductor material can be varied under an external electrical field. Devices made from semiconductor materials are the foundation of modern electronics, including radio, computers, telephones, and many other devices. Semiconductor devices include the transistor, many kinds of diodes including the light-emitting diode, the silicon controlled rectifier, and digital and analog integrated circuits. Solar photovoltaic panels are large semiconductor devices that directly convert light energy into electrical energy. In a metallic conductor, current is carried by the flow of electrons. In semiconductors, current can be carried either by the flow of electrons or by the flow of positively-charged "holes" in the electron structure of the material.

 
A semiconductor is a material that has an electrical resistivity between that of a conductor and an insulator. In semiconductors, current can be carried either by the flow of electrons or by the flow of positively-charged "holes" in the electron structure of the material. Silicon is used to create most semiconductors commercially. Dozens of other materials are used, including germanium, gallium arsenide, and silicon carbide.
 

materials which have an electrical resistivity between that of a conductor & an insulator.

 

it is a material which has property of insulators as well as conductors

 

these are generally those substances which have forbidden energy gap intermediate between conductor and insulator.and there conductivity ranges between conductors and insulator.