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Which outcome occurs when a semiconductor's doping concentration increases significantly?

A)Band gap narrowing occurs
B)Debye length increases
C)Fermi level stabilizes at midgap
D)Intrinsic carrier concentration decreases

💡 Explanation

Band gap narrowing occurs because increased dopant impurities cause enhanced interactions between charge carriers. The primary mechanism is the screened electron-electron and electron-impurity interactions; therefore, the band gap energy shrinks, rather than other electrical properties under normal conditions.

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