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Highly Luminescent Nanocrystals From Removal of Impurity Atoms Residual From Ion-Exchange Synthesis

Authors

  • Dr. Prashant K. Jain,

    1. Material Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 (USA)
    2. Department of Chemistry and Miller Institute for Basic Research in Science, University of California, Berkeley (USA)
    3. Current address: Department of Chemistry, University of Illinois (USA)
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  • Brandon J. Beberwyck,

    1. Material Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 (USA)
    2. Department of Materials Science and Engineering, University of California, Berkeley (USA)
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  • Lam-Kiu Fong,

    1. Material Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 (USA)
    2. Department of Chemistry, University of California, Berkeley (USA)
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  • Dr. Mark J. Polking,

    1. Material Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 (USA)
    2. Department of Materials Science and Engineering, University of California, Berkeley (USA)
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  • Prof. A. Paul Alivisatos

    Corresponding author
    1. Material Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 (USA)
    2. Department of Chemistry, University of California, Berkeley (USA)
    • Material Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 (USA)
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Errata

This article is corrected by:

  1. Errata: Corrigendum: Highly Luminescent Nanocrystals From Removal of Impurity Atoms Residual From Ion-Exchange Synthesis Volume 51, Issue 29, 7069, Article first published online: 11 July 2012

  • This work was supported by the physical chemistry of semiconductor nanocrystals program, KC3105 of the Director, Office of Science, Office of Basic Energy Sciences, of the United States Department of Energy under grant number DE-AC02-05CH11231. Work on cation exchange and defect purification by P.K.J. was supported by a Miller Fellowship from UC Berkeley. Work on defect purification by B.J.B. was supported by a fellowship from the Department of Energy Office of Science Graduate Fellowship Program (DOE SCGF), made possible in part by the American Recovery and Reinvestment Act of 2009, administered by ORISE-ORAU under grant number DE-AC05-06OR23100. M.J.P. was supported by a National Science Graduate Research Fellowship and by a National Science Foundation Integrative Graduate Education and Research Traineeship Fellowship.

Abstract

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Pure crystals: Ion exchange of semiconductor nanocrystals yielded materials with poor optoelectronic properties such as low photoluminescence quantum yields. The reason for the low quantum yields of these nanocrystals are impurities at the level of a few atoms per nanocrystal. Cation-exchanged nanostructures, however, could be purified post exchange from such impurities resulting in high-quality nanocrystals (see picture).

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