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← ScienceWhich outcome occurs when a semiconductor's temperature increases, impacting its minimum photon absorption?
A)Band gap decreases; absorption increases✓
B)Lattice vibrations cease abruptly
C)Fermi level remains constant
D)Intrinsic carrier density diminishes
💡 Explanation
The semiconductor band gap narrows because increased temperature enhances electron-phonon interactions causing band gap renormalization, therefore absorption increases. The band gap shrinks, rather than remaining static, because thermal energy disrupts lattice periodicity.
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