Band gaps for conductors, semiconductors and insulators
Materials can be classified on the basis of their band-gaps as follows: 1. Insulators: Eg>3eV 2. Semiconductors: Eg<3eV 3. Metals: Eg=0eV Note: Band-gap is a function of the material, impurities, doping, temperature, etc.
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Advantages of semiconductor devices
Some advantages of semiconductors include:
Reduction in the size of electrical circuits and hence cost.