title: Single-nanocrystal spectroscopy of white-light-emitting CdSe nanocrystals.
abstract: 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.
authors.affiliation: Department of Chemistry, Vanderbilt University, VU Station B Box 351822, Nashville, Tennessee 37235, United States.
authors.forename: Albert D
authors.initials: AD
authors.lastname: Dukes
authors.forename: Philip C
authors.initials: PC
authors.lastname: Samson
authors.forename: Joseph D
authors.initials: JD
authors.lastname: Keene
authors.forename: Lloyd M
authors.initials: LM
authors.lastname: Davis
authors.forename: John P
authors.initials: JP
authors.lastname: Wikswo
authors.forename: Sandra J
authors.initials: SJ
authors.lastname: Rosenthal
mesh_terms: D019187:Cadmium Compounds / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry*; D036103:Nanotechnology / Q000379:methods*; D010316:Particle Size; D018036:Selenium Compounds / Q000737:chemistry*; D013050:Spectrometry, Fluorescence; D013499:Surface Properties
chemical_list: D019187:Cadmium Compounds; D018036:Selenium Compounds; C058667:cadmium selenide