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← ScienceWhich outcome results when excessive doping alters semiconducting material's valence band?
A)Reduced electron-hole direct recombination probability
B)Increased reverse saturation diffusion current✓
C)Increased intrinsic carrier concentrations only
D)Reduced lattice vibrational mode influence
💡 Explanation
Band gap narrowing occurs because heavy doping alters the semiconductor's band structure through many-body effects, therefore saturation current rises rather than suppressing carrier concentrations because effects are pronounced at high doping.
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