Single-nanocrystal spectroscopy of white-light-emitting CdSe nanocrystals.

Dukes AD, Samson PC, Keene JD, Davis LM, Wikswo JP, Rosenthal SJ
J Phys Chem A. 2011 115 (16): 4076-81

PMID: 21338163 · DOI:10.1021/jp1109509

We report the observation of broad-spectrum fluorescence from single CdSe nanocrystals. Individual semiconductor nanocrystals typically have a narrower emission spectrum than that of an ensemble. However, our experiments show that the ensemble white-light emission observed in ultrasmall CdSe nanocrystals is the result of many single CdSe nanocrystals, each emitting over the entire visible spectrum. These results indicate that each white-light-emitting CdSe nanocrystal contains all the trap states that give rise to the observed white-light emission.

MeSH Terms (7)

Cadmium Compounds Nanostructures Nanotechnology Particle Size Selenium Compounds Spectrometry, Fluorescence Surface Properties

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