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← ScienceWhich outcome impairs LED efficiency when defects increase?
A)Increased non-radiative recombination occurs✓
B)Increased stimulated emission probability
C)Decreased photon recycling efficiency
D)Decreased internal quantum efficiency
💡 Explanation
Increased defects drive non-radiative recombination because Shockley-Read-Hall (SRH) recombination provides alternative pathways for electron-hole recombination within the band gaps. Therefore, light emission is suppressed, rather than alternative processes like stimulated emission, under these conditions.
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