Mechanistic Insights into the Formation of InP Quantum Dots

Authors

  • Peter M. Allen,

    1. Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139 (USA), Fax: (+1) 617-452-2708
    Search for more papers by this author
    • These authors contributed equally to this work.

  • Brian J. Walker,

    1. Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139 (USA), Fax: (+1) 617-452-2708
    Search for more papers by this author
    • These authors contributed equally to this work.

  • Moungi G. Bawendi Prof.

    1. Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139 (USA), Fax: (+1) 617-452-2708
    Search for more papers by this author

  • This work was supported in part by the MIT-Harvard NIH CCNE (1U54-CA119349) and the US ARO through the ISN (W911NF-07-D-0004).This work also made use of the DCIF (CHE-980806, DBI-9729592). B.J.W. was supported by a NSF Graduate Research Fellowship. Special thanks to Alejandro Lichtscheidl and Peter Reiss for helpful discussions, and Jeffrey Simpson for assistance with HMBC measurements.

Abstract

original image

InP Kudos: The molecular mechanism of InP colloidal quantum dot (QD) syntheses was investigated by NMR spectroscopy. Unlike methods for monodisperse PbSe and CdSe, existing InP syntheses result in total depletion of molecular phosphorous species following nucleation, so QD growth is due exclusively to non-molecular ripening. Amines inhibit precursor depletion by solvation (see picture), contrary to previous reports.

Ancillary