Experimental study demonstrates photon-correlation spectroscopy for characterizing optical heterogeneity in semiconductor nanocrystals, indicating distinct subpopulation emission mechanisms.
The heterogeneity in optically active nanomaterials often hinders efforts to understand their basic photophysics and can limit their use in practical applications. Existing methods have difficulty characterizing single-emitter spectra and optical heterogeneity with accuracy and ease-of-use. Here, we share modeled and experimental data pertaining to the development of SPICEE (SPectrally Imbalanced Correlations from Ensemble Emission), a photon-correlation technique that automatically samples an ensemble to recover statistical trends in the single-particle spectra. We applied SPICEE to blue-emitting ZnSeTe semiconductor nanocrystals relevant to display applications and find that the ensemble’s low color purity is primarily caused by a small subpopulation of nanocrystals with a distinct emission mechanism. Analysis of these data indicated that SPICEE can be an efficient and informative tool for studying nanoscale systems. See readme.txt for further information on the file formatting.
No takes yet. Share an insight, caveat, or question.
Horowitz et al. (2026) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: