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← ScienceWhich risk increases when semiconductor devices cool significantly during operation?
A)Reduced minority carrier recombination lifetime
B)Increased Zener breakdown susceptibility✓
C)Decreased electron phonon scattering rates
D)Greater thermal runaway likelihood
💡 Explanation
Zener breakdown susceptibility increases as cooling narrows the band gap, because decreasing temperature allows electrons to tunnel more readily; therefore, breakdown voltage decreases upon cooling, rather than other carrier dynamics being dominant.
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