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← TechnologyWhich consequence results when excessive current pulses damage gallium nitride LEDs?
A)Reduced quantum efficiency, increased heat✓
B)Forward voltage decreases and blue-shift
C)Increased light output, minimal variance
D)Stable performance, longer operational lifespan
💡 Explanation
Excessive current causes a phenomenon called electromigration, leading to degradation because the metal atoms in the electrodes move, creating voids; therefore quantum efficiency decreases significantly and creates added Joule heating, rather than more light or a longer lifespan under varied conditions.
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