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← ScienceWhich outcome occurs when dopants alter semiconductor orbitals?
A)Decreased conductivity at cryogenic temperatures
B)Increased free carrier concentration locally✓
C)Enhanced phonon scattering and cooling
D)Reduced band gap energy overall globally
💡 Explanation
Introduction of dopants creates vacancies, locally increasing carrier concentration because the doping introduces new energy levels close to the conduction or valence band, therefore increasing their concentration rather than creating temperature effects.
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