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We use transient photoluminescence to spectrally resolve the emission from 1, 2, and 3 electron–hole pairs states in CdSe colloidal nanocrystals with radii ranging between 2.3 and 5.2nm. Temporally and spectrally resolved multiexciton emission from single NCs is also observed. The observation of multiexciton emission enables new experiments and potential applications at both the single NC level and...