Compare Conductors, Semiconductors & Insulators using Energy Band diagram
Question
Compare Conductors, Semiconductors & Insulators using Energy Band diagram
Solution
Sure, let's compare conductors, semiconductors, and insulators using energy band diagrams.
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Conductors: In conductors, the valence band and conduction band overlap each other. This means that electrons can easily move from the valence band to the conduction band. As a result, conductors have a high conductivity and low resistivity. The energy band diagram of a conductor shows no energy gap between the valence and conduction bands.
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Semiconductors: In semiconductors, the valence band and conduction band are separated by a small energy gap, also known as the band gap. At absolute zero, semiconductors behave like insulators. However, as the temperature increases, some electrons gain enough energy to jump from the valence band to the conduction band, making semiconductors conductive. The energy band diagram of a semiconductor shows a small energy gap between the valence and conduction bands.
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Insulators: In insulators, the valence band and conduction band are separated by a large energy gap. This means that electrons cannot easily move from the valence band to the conduction band, making insulators highly resistive. The energy band diagram of an insulator shows a large energy gap between the valence and conduction bands.
In summary, the energy band diagrams of conductors, semiconductors, and insulators differ in the size of the energy gap between the valence and conduction bands. This energy gap determines the material's conductivity and resistivity.
Similar Questions
Compare Conductors, Semiconductors & Insulators using Energy Band diagram
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