explain energy band in semiconductor
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Every solid has its own characteristic energy-band structure. ... In semiconductors and insulators, electrons are confined to a number of bands of energy, and forbidden from other regions. The term "band gap" refers to the energy difference between the top of the valence band and the bottom of the conduction band.
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Energy bands consisting of a large number of closely spaced energy levels exist in crystalline materials. The bands can be thought of as the collection of the individual energy levels of electrons surrounding each atom. ... The energy band model is crucial to any detailed treatment of semiconductor devices.
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