Exciton localization and migration in individual CdSe quantum wires at low temperatures

J. J. Glennon, R. Tang, W. E. Buhro, R. A. Loomis, D. A. Bussian, H. Htoon, V. I. Klimov

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

Low-temperature (<40 K) photoluminescence (PL) spectra of individual CdSe nanocrystal quantum wires exhibit narrow (<5 meV) isolated peaks spanning a range ≤50 meV. We attribute these features to emission of excitons localized in shallow (a few meV deep) tight potential minima superimposed on longer-scale and larger-amplitude variations of the potential energy. Spectrally resolved PL dynamics reveal decreasing exciton-decay rates with decreasing emission energy. These observations are consistent with exciton relaxation within a manifold of localization sites characterized by an exponential density of states.

Original languageEnglish
Article number081303
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume80
Issue number8
DOIs
Publication statusPublished - Aug 11 2009

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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