Bound 1D excitons in single CdSe quantum wires

Virginia L. Wayman, Paul J. Morrison, Fudong Wang, Rui Tang, William E. Buhro, Richard A. Loomis

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Photogenerated electron-hole pairs are observed to be bound as 1D excitons in CdSe quantum wires (QWs) at room temperature. Microscopy experiments performed on dilute samples of CdSe QWs prepared on coverslips with patterned electrodes reveal that there is no change in either the overall photoluminescence (PL) intensity or the distribution of the PL intensity with the application of an external electric field. Changes in the PL intensity, and thus evidence for separate charge carriers within the QWs, are observed only for concentrated samples. In these concentrated samples, a thin film of other compounds, including trioctylphosphine oxide and a bismuth salt formed in the synthesis, is observed to encompass the QWs. The separate charge carriers that influence the PL intensity are attributed to the other compounds in the sample.

Original languageEnglish
Pages (from-to)2627-2632
Number of pages6
JournalJournal of Physical Chemistry Letters
Issue number18
StatePublished - Sep 20 2012


  • Physical Processes in Nanomaterials and Nanostructures


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