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← ScienceWhich outcome occurs when the dopant concentration significantly exceeds the solubility limit within a semiconductor material?
A)Formation of secondary phase precipitates✓
B)Increased energy bandgap width
C)Enhanced intrinsic carrier concentration
D)Decreased electron-hole recombination rate
💡 Explanation
Formation of secondary phase precipitates occurs because exceeding solubility limits causes dopant atoms to aggregate, via spinodal decomposition, into energetically stable compounds rather than remaining uniformly distributed; therefore, precipitates form, rather than bandgap widening under normal doping.
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