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← TechnologyWhich outcome occurs when excessive current persists in a high-brightness LED?
A)Thermal runaway degrades quantum efficiency✓
B)Increased radiative recombination boosts output
C)Band gap widening enhances light extraction
D)Auger recombination cools the active region
💡 Explanation
Thermal runaway degrades efficiency because self-heating raises the LED junction temperature, which increases leakage current in a positive feedback loop. This process leads to reduced light output and eventual failure, rather than temperature stabilization.
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