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← ScienceWhich risk increases when an electron encounters a high potential barrier within a semiconductor?
A)Decreased thermal vibrational excitation
B)Increased probability of quantum tunnelling✓
C)Greater electron-hole recombination rate
D)Enhanced intervalley phonon scattering
💡 Explanation
An electron may tunnel through a classically forbidden region; applying wave mechanics finds electron tunneling probability rises to reach potential barrier; therefore, higher potential greatly increases tunneling, rather than alternative scattering effects because other mechanisms may decrease effects of barrier.
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