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Which effect on electron wave functions results when a semiconductor quantum dot's dimensions approach the exciton Bohr radius?

A)Increased quantum confinement energy
B)Suppressed Auger recombination rate
C)Reduced radiative recombination lifetime
D)Enhanced thermal dephasing rate

💡 Explanation

When a quantum dot's size approaches the exciton Bohr radius, quantum confinement drastically increases because the electron and hole wave functions are compressed into a smaller volume, increasing their kinetic energy. Therefore increased quantum confinement energy results, rather than decreased recombination or modified dephasing, which depend on interface properties or phonon interactions.

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