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Which characteristic dominates when an LED crystal defect increases?

A)Radiative recombination decreases significantly
B)External quantum efficiency substantially increases
C)Forward voltage shows negligible change
D)Spectral bandwidth becomes substantially narrower

💡 Explanation

Non-radiative recombination becomes dominant because increased crystal defects provide more energy dissipation pathways; therefore radiative recombination declines, rather than increasing quantum efficiency, since electrons lose energy without emitting photons inside poorly crystalline structures.

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