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← ScienceWhich outcome occurs when impurities increase within photovoltaic semiconductors?
A)Band gap energy reduction occurs✓
B)Increased thermal conductivity occurs
C)Photovoltaic efficiency is unaffected
D)Photon absorption increases linearly
💡 Explanation
Increased impurities induce changes to the crystal lattice, affecting band gap energy via the mechanism of impurity scattering, because localized states are created within the gap; therefore, the band gap decreases linearly rather than maintaining consistent efficiency in other scenarios.
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