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Synthesis and Characterization of Strongly Fluorescent CdTe Nanocrystal Colloids

Published online by Cambridge University Press:  21 February 2011

Frederic V. Mikulec  and
Moungi G. Bawendi
Frederic V. Mikulec
Affiliation:
Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA 02139
Moungi G. Bawendi
Affiliation:
Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA 02139
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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.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 581: Symposium F – Nanophase & Nanocomposite Materials II , 1999 , 139
Copyright
Copyright © Materials Research Society 2000

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