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← ScienceWhich phenomenon enables current flow when thermal energy reduces a semiconductor's band gap?
A)Increased electron-hole pair generation✓
B)Phonon bottleneck reduction effect
C)Augmented Umklapp scattering frequency
D)Enhanced polariton quasiparticle transport
💡 Explanation
More electron-hole pairs generate upon band gap decrease because thermal excitation overcomes the reduced energy barrier; therefore, conductivity rises, rather than being reduced by scattering or changed to quasiparticle transport.
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