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The authors report on the blue electroluminescence from CdSe∕ZnS core/shell nanocrystals prepared from ultrasmall, magic size CdSe clusters that have a diameter of less than 2nm. The light emitting device consists of an active layer of nanocrystals blended with 4,4′,N,N′- diphenylcarbazole and an evaporated electron transporting/hole blocking layer made of 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline. A blue, stable electroluminescence at 485nm from the hybrid device was observed, in good agreement with the photoluminescence spectra of a solid film of the same nanocrystals used for the device.
American Institute of Physics
Publication date: 
29 Jan 2007

Aurora Rizzo, Yanqin Li, Stefan Kudera, Fabio Della Sala, Marco Zanella, Wolfgang J Parak, Roberto Cingolani, Liberato Manna, Giuseppe Gigli

Biblio References: 
Volume: 90 Issue: 5 Pages: 051106
Applied Physics Letters