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Which 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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