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We investigate the photon statistics of the light emitted by singleself-assembled hybrid gold-CdSe/CdS/CdZnS colloidal nanocrystal supraparticlesthrough the detailed analysis of the intensity autocorrelation function$g^{(2)}(\tau)$. We first reveal that, despite the large number of nanocrystalsinvolved in the supraparticle emission, antibunching can be observed. We thenpresent a model based on non-coherent F\"orster energy transfer and Augerrecombination that well captures photon antibunching. Finally, we demonstratethat some supraparticles exhibit a bunching effect at short time scalescorresponding to coherent collective emission.

Photon correlations in the collective emission of hybrid gold-(CdSe/CdS/CdZnS) nanocrystal supraparticles