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← ScienceWhich outcome occurs when a semiconductor's band gap nears zero?
A)Material approaches metallic conductivity✓
B)Photoluminescence efficiency greatly increases
C)Thermal runaway becomes self-limiting
D)Reverse breakdown voltage reaches maximum
💡 Explanation
Near zero band-gap enables plentiful electrons crossing into the conduction band through Thermal Excitation, because this reduces the energy needed for electron transition; therefore, the material acts as a conductor rather than luminescing or behaving predictably under reverse bias.
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