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Which 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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