In terms of energy band, semiconductor materials at room temperature do NOT have
Correct answer: A. partially filled valence band.
- A. partially filled valence band.
- B. partially filled conduction band
- C. plenty of free electrons for electrical conduction
- D. narrow forbidden energy gap between conduction and valence band
Explanation
Semiconductor materials at room temperature do not have a partially filled conduction band, as this would indicate metallic behavior. The correct answer is that they have a partially filled valence band, which is essential for their conductivity. The other options are incorrect because semiconductor materials do not have a narrow forbidden energy gap like insulators, nor do they have plenty of free electrons like metals.
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About Electrical Properties of Solids
Electrical properties of solids depend on their band structure, charge carriers and conductivity. The topic compares conductors, insulators and semiconductors, relates resistivity to temperature, and covers intrinsic and extrinsic semiconductors, donor and acceptor impurities, electron and hole conduction, and the formation of p-type and n-type materials.
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