We thank Michael Frongillo for assistance with the high-resolution electron microscopy. This work was funded in part by the NSF-MRSEC program (DMR 0213282) and by the U.S. Army through the Institute for Soldier Nanotechnologies, under Contract DAAD-19-02-0002 with the U.S. Army Research Office.
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Blue Luminescence from (CdS)ZnS Core–Shell Nanocrystals†
Article first published online: 6 APR 2004
DOI: 10.1002/anie.200453728
Copyright © 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
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How to Cite
Steckel, J. S., Zimmer, J. P., Coe-Sullivan, S., Stott, N. E., Bulović, V. and Bawendi, M. G. (2004), Blue Luminescence from (CdS)ZnS Core–Shell Nanocrystals. Angew. Chem. Int. Ed., 43: 2154–2158. doi: 10.1002/anie.200453728
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Publication History
- Issue published online: 6 APR 2004
- Article first published online: 6 APR 2004
- Manuscript Received: 12 JAN 2004
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- 13ZnSe has a room-temperature bulk band gap of 2.7 eV (460 nm).
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- 15ZnTe and CdS have room-temperature bulk band gaps of 2.39 (519 nm) and 2.42 eV (512 nm), respectively.
- 16, , Angew. Chem. 2002, 114, 2474;Angew. Chem. Int. Ed. 2002, 41, 2368.Direct Link:Direct Link:
- 17The QD PL quantum efficiencies were determined by comparing the integrated emission of a given QD sample in dilute hexane solution with an optical density of 0.1 with that of the laser dye Coumarin 102 (Lambda Physik) in ethanol.
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- 19WDS confirmed the thickness of the ZnS shell for the QD sample shown in Figures 2 b and 5 c, giving an average element weight percent of 21.6±0.9 % for Cd, 32.2±0.5 % for Zn, and 46.2±0.7 % for S. These values correspond to a 0.77 nm (2.5 monolayers) thick theoretical ZnS shell, which is consistent with the average experimental thickness obtained from TEM.
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- 21, , , , US Patent 20020144644, 2002.
- 22ITO=indium tin oxide; CBP=4,4′-N,N′-dicarbazolyl-biphenyl; TAZ=3-(4-biphenylyl)-4-phenyl-5-tert-butylphenyl-1,2,4-triazole; Alq3=tris-(8-hydroxyquinoline)aluminum.