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← ScienceWhich consequence results when quantum wells are narrowed?
A)Increased electron tunneling probability✓
B)Band gap energy decreases slightly
C)Reduced electron-phonon scattering rate
D)Enhanced electron mobility increases
💡 Explanation
Reducing the width increases quantum confinement; the Heisenberg Uncertainty Principle dictates that increasing spatial confinement increases momentum uncertainty. Because momentum is directly related to kinetic energy, this increases electron tunneling probability rather than decreasing band gap energy therefore.
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