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Which consequence results when significant lattice vacancies occur in high-power LED phosphors?

A)Reduced quantum yield declines sharply
B)Increased thermal conduction reduces lifespan
C)Higher resistance lowers current flow
D)Slower recombination generates photons

💡 Explanation

Reduced output occurs because lattice vacancies cause non-radiative recombination due to increased trapping and scattering limiting radiative transitions. Therefore, the quantum yield is reduced severely, rather than increased thermal conductivity or slower recombination process within the LED.

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