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For LEDs operating at elevated temperature, which outcome accelerates due to increased ionic mobility?

A)Non-radiative recombination increases exponentially
B)Quantum well intermixing stabilizes spectrum
C)Radiative efficiency linearly improves overall
D)External quantum efficiency remains stable

💡 Explanation

Increased temperatures accelerate the diffusion of defects which act as sites to promote non-radiative combination through the Shockley-Read-Hall (SRH) mechanism. This lowers the luminescence efficiency because the electrons lose energy without emitting light rather than improved performance.

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