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← ScienceWhich mechanism impacts semiconductor quantum dot emission wavelength based on dot size?
A)Quantum confinement effect on electron orbitals✓
B)Surface plasmon resonance shifts with diameter
C)Phonon scattering altering bandgap energy
D)Auger recombination dominating radiative decay
💡 Explanation
When the quantum dot size decreases, quantum confinement increases because electrons are forced into smaller regions, leading to higher energy levels of orbitals, thus emitting shorter wavelengths. Therefore, quantum confinement dictates wavelength rather than plasmon resonance, phonon scattering, or Auger recombination, which involve alternate processes.
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