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← ScienceWhich outcome occurs when donor impurities are introduced into a semiconductor's crystal lattice?
A)Increased electron concentration in conduction band✓
B)Reduced hole concentration in valence band
C)Decreased band gap energy overall
D)Pinning the Fermi level at midgap
💡 Explanation
Introducing donor impurities into a semiconductor results in increased electron concentration in the conduction band because the dopants contribute extra electrons via *n-type doping*; therefore the electron population will be significantly higher rather than affecting hole availability directly.
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