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← TechnologyWhich outcome occurs when microscopic voids form near LED p-n junctions?
A)Reduced quantum efficiency by phonon scattering✓
B)Increased lifespan through optimized heat dissipation
C)Spectral blue shift from narrowed bandgap
D)Improved forward voltage, minimal series resistance
💡 Explanation
Reduced quantum efficiency occurs because phonon scattering increases due to increased lattice defects introduced by the voids; this increases non-radiative recombination rather than directly producing photons. Therefore, light output decreases because the energy is dissipated as heat rather than light.
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