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← ScienceWhich conduction outcome occurs when a semiconductor's crystal lattice contains interstitial impurity atoms?
A)Increased free carrier concentration✓
B)Reduced electron-hole recombination
C)Increased energy bandgap width
D)Localized surface plasmon resonance
💡 Explanation
Increased free carrier concentration of either electrons or holes will develop, because dopant atoms introduce extra energy levels close to the conduction or valence bands; therefore conductivity rises, rather than reducing bandgap width.
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