Electronic impurity doping in CdSe nanocrystals

Ayaskanta Sahu, Moon Sung Kang, Alexander Kompch, Christian Notthoff, Andrew W. Wills, Donna Deng, Markus Winterer, C. Daniel Frisbie, David J. Norris

Research output: Contribution to journalArticle

Abstract

We dope CdSe nanocrystals with Ag impurities and investigate their optical and electrical properties. Doping leads not only to dramatic changes but surprising complexity. The addition of just a few Ag atoms per nanocrystal causes a large enhancement in the fluorescence, reaching efficiencies comparable to core-shell nanocrystals. While Ag was expected to be a substitutional acceptor, nonmonotonic trends in the fluorescence and Fermi level suggest that Ag changes from an interstitial (n-type) to a substitutional (p-type) impurity with increased doping.

Original languageEnglish (US)
Pages (from-to)2587-2594
Number of pages8
JournalNano Letters
Volume12
Issue number5
DOIs
StatePublished - May 9 2012

Fingerprint

Nanocrystals
nanocrystals
Doping (additives)
Impurities
impurities
Fluorescence
electronics
fluorescence
Fermi level
interstitials
Electric properties
Optical properties
electrical properties
trends
optical properties
Atoms
augmentation
causes
atoms

Keywords

  • cation exchange
  • colloidal quantum dots
  • photoluminescence enhancement
  • Semiconductor nanocrystals
  • silver doping
  • thin-film transistors

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanical Engineering

Cite this

Sahu, A., Kang, M. S., Kompch, A., Notthoff, C., Wills, A. W., Deng, D., ... Norris, D. J. (2012). Electronic impurity doping in CdSe nanocrystals. Nano Letters, 12(5), 2587-2594. https://doi.org/10.1021/nl300880g

Electronic impurity doping in CdSe nanocrystals. / Sahu, Ayaskanta; Kang, Moon Sung; Kompch, Alexander; Notthoff, Christian; Wills, Andrew W.; Deng, Donna; Winterer, Markus; Frisbie, C. Daniel; Norris, David J.

In: Nano Letters, Vol. 12, No. 5, 09.05.2012, p. 2587-2594.

Research output: Contribution to journalArticle

Sahu, A, Kang, MS, Kompch, A, Notthoff, C, Wills, AW, Deng, D, Winterer, M, Frisbie, CD & Norris, DJ 2012, 'Electronic impurity doping in CdSe nanocrystals', Nano Letters, vol. 12, no. 5, pp. 2587-2594. https://doi.org/10.1021/nl300880g
Sahu A, Kang MS, Kompch A, Notthoff C, Wills AW, Deng D et al. Electronic impurity doping in CdSe nanocrystals. Nano Letters. 2012 May 9;12(5):2587-2594. https://doi.org/10.1021/nl300880g
Sahu, Ayaskanta ; Kang, Moon Sung ; Kompch, Alexander ; Notthoff, Christian ; Wills, Andrew W. ; Deng, Donna ; Winterer, Markus ; Frisbie, C. Daniel ; Norris, David J. / Electronic impurity doping in CdSe nanocrystals. In: Nano Letters. 2012 ; Vol. 12, No. 5. pp. 2587-2594.
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