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Synthesis and Characterization of Strongly Fluorescent CdTe Nanocrystal Colloids

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Abstract

We present a synthesis of colloidal CdTe nanocrystals whose absolute room temperature quantum yields are routinely above 60%. The preparation is based on the trioctylphosphine oxide (TOPO) method reported by Murray, with a more stalbe tellurium precursor now used as the chalcogenide source. The photoluminescence is continuously tunable over the range 590-760 nm and is as narrow as 135 meV (45 nm) FWHM. No deep trap luminescence is detected for the diameter range 4-11 nm. CdTe nanocrystals are characterized by UV/vis absorption, photoluminescence emission, transmission electron microscopy, and powder X-ray diffraction.

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Authors and Affiliations

  1. Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA

    Frederic V. Mikulec & Moungi G. Bawendi

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  1. Frederic V. Mikulec
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  2. Moungi G. Bawendi
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Mikulec, F.V., Bawendi, M.G. Synthesis and Characterization of Strongly Fluorescent CdTe Nanocrystal Colloids. MRS Online Proceedings Library 581, 139–144 (1999). https://doi.org/10.1557/PROC-581-139

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  • DOI: https://doi.org/10.1557/PROC-581-139

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