Spin-polarizable excitonic luminescence in colloidal mn 2+-doped CdSe quantum dots

Rémi Beaulac, Paul I. Archer, Xinyu Liu, Sanghoon Lee, G. Mackay Salley, Margaret Dobrowolska, Jacek K. Furdyna, Daniel R. Gamelin

Research output: Contribution to journalArticle

152 Citations (Scopus)

Abstract

The photoluminescence of colloidal Mn 2+-doped CdSe nanocrystals has been studied as a function of nanocrystal diameter. These nanocrystals are shown to be unique among colloidal doped semiconductor nanocrystals reported to date in that quantum confinement allows tuning of the CdSe bandgap energy across the Mn 2+ excited-state energies. At small diameters, the nanocrystal photoluminescence is dominated by Mn 2+ emission. At large diameters, CdSe excitonic photoluminescence dominates. The latter scenario has allowed spin-polarized excitonic photoluminescence to be observed in colloidal doped semiconductor nanocrystals for the first time.

Original languageEnglish
Pages (from-to)1197-1201
Number of pages5
JournalNano Letters
Volume8
Issue number4
DOIs
Publication statusPublished - 2008 Apr

ASJC Scopus subject areas

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

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    Beaulac, R., Archer, P. I., Liu, X., Lee, S., Salley, G. M., Dobrowolska, M., Furdyna, J. K., & Gamelin, D. R. (2008). Spin-polarizable excitonic luminescence in colloidal mn 2+-doped CdSe quantum dots. Nano Letters, 8(4), 1197-1201. https://doi.org/10.1021/nl080195p