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← ScienceWhich risk significantly increases when a semiconductor crystal contains dislocations?
A)Increased electron-hole recombination rate✓
B)Higher thermal expansion coefficient
C)Decreased piezoelectric voltage generation
D)Suppressed superconduction critical temperature
💡 Explanation
Increased electron-hole recombination happens because dangling bonds within dislocations act as traps. The mechanism is Shockley-Read-Hall recombination; therefore, the recombination rate rises rather than thermal expansion being affected, or superconduction being enabled.
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