Disorder-Induced Optical Heterogeneity in Single CdSe Nanowires

Authors

  • V. V. Protasenko,

    1. Department of Chemistry and Biochemistry, Notre Dame Radiation Laboratory, University of Notre Dame, 251 Nieuwland Science Hall, Notre Dame, IN 46556, USA
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  • K. L. Hull,

    1. Department of Chemistry and Biochemistry, Notre Dame Radiation Laboratory, University of Notre Dame, 251 Nieuwland Science Hall, Notre Dame, IN 46556, USA
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  • M. Kuno

    1. Department of Chemistry and Biochemistry, Notre Dame Radiation Laboratory, University of Notre Dame, 251 Nieuwland Science Hall, Notre Dame, IN 46556, USA
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  • We thank V. S. Dneprovskii, E. A. Muljarov, and Al. L. Efros for helpful discussions. This work was supported by the ACS Petroleum Research Fund, the Notre Dame Faculty Research Program, and by the University of Notre Dame. We thank the Notre Dame Radiation Laboratory and the Office of Basic Energy Sciences of the U.S. Department of Energy for use of their facilities. Supporting Information is available online from Wiley InterScience or from the author.

Abstract

original image

Solution-grown CdSe nanowires (NWs) combine numerous aspects of 1D carrier physics. The effects of disorder on the optical properties of individual, quantum-confined straight/branched NWs (see TEM and fluorescence images) is shown here; in these NWs the optical heterogeneity is apparent through non-uniform intrawire emission intensities. The current study has relevance to applications of NWs as y-branch switches[17] or as active elements in hybrid photovoltaics given the impact such heterogeneity may have on their transport properties.

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