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Which outcome occurs when a quantum dot's exciton wavefunction overlaps trap-state defect functions?

A)Non-radiative electron-hole recombination accelerates
B)Quantum dot emission wavelength redshifts
C)Exciton binding energy increases sharply
D)Oscillator strength of transition increases

💡 Explanation

Non-radiative recombination accelerates because trap states introduce alternative decay channels through the mechanism of electron-phonon coupling, reducing luminescence efficiency. Therefore, recombination rate is higher rather than radiative decay, given appropriate dot size and defect function overlap.

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