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Which change occurs when radiative recombination dominates in direct band semiconductors?

A)Reduced electron-hole pair lifetime
B)Increased defect-mediated recombination
C)Enhanced impurity scattering rate
D)Increased phonon emission probability

💡 Explanation

Radiative recombination emits photons, therefore it occurs via direct band transitions. Minority carrier lifetime decreases because electrons directly recombine rather than via traps or defects, causing non-radiative processes.

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