Question

On the basis of band theory of solids the semiconductors have _____________________? *​

Answer 1

Explanation:

According to the band theory, semiconductors will actually act as insulators at absolute zero. Above this temperature and yet still staying below the melting point of the solid, the metal would act as a semiconductor. Semiconductors are classified by the fully occupied valence band and unoccupied conduction band

Answer 2

Answer:

Semiconductors have a completely filled valence band, a partially filled conduction band and a narrow forbidden band

Explanation:

• Semiconductors are materials whose conductivity values are between those of conductors and insulators
• They have energy gaps whose values are the difference in energy levels between the valence and conduction bands
• The valence band is the highest energy level band in semiconductors just like the valence shell of an atom
• The conduction band is the lowest
• Electrons are transferred from the valence band to the conduction band
• Electron transfer takes place as the forbidden band is quite narrow

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