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← ScienceWhich outcome occurs when a rapidly cooled semiconductor crystal contains dislocations?
A)Increased rate of electron-hole recombination✓
B)Enhanced thermal conductivity at defects
C)Increased free carrier concentration locally
D)Higher efficiency optical photon emission
💡 Explanation
Dislocations influence the band structure near defects, leading to increased electron-hole recombination rates. Recombination occurs because dislocations introduce electronic states within the band gap; therefore, electrons and holes recombine more readily, rather than maintain their individual carrier states.
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