Synthesis and characterization of Al- and In-doped CdSe nanocrystals

Andrew W. Wills, Moon Sung Kang, Katherine M. Wentz, Sophia E. Hayes, Ayaskanta Sahu, Wayne L. Gladfelter, David J. Norris

Research output: Contribution to journalArticle

Abstract

Al- and In-doped CdSe nanocrystals were synthesized using a three-part core-shell synthesis. CdSe core nanocrystals were first prepared, then allowed to react with dopant precursors in the presence of weakly binding ligands, and finally overcoated with an additional shell of CdSe. The addition of Al dopants quickened shell overgrowth and led to more monodisperse nanocrystals while the addition of In dopants produced more polydisperse particles, as seen by absorption spectroscopy. Elemental analysis combined with chemical etching revealed the dopants were inside the particles and solid state 27Al nuclear magnetic resonance (NMR) spectra indicated that the Al impurities were well dispersed. When the Al-doped nanocrystals were processed into thin-film transistors, enhanced n-type transport was observed with a rise in the Fermi level compared to undoped particles.

Original languageEnglish (US)
Pages (from-to)6335-6342
Number of pages8
JournalJournal of Materials Chemistry
Volume22
Issue number13
DOIs
StatePublished - Apr 7 2012

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Nanocrystals
Doping (additives)
Thin film transistors
Fermi level
Absorption spectroscopy
Etching
Ligands
Nuclear magnetic resonance
Impurities
Chemical analysis

ASJC Scopus subject areas

  • Materials Chemistry
  • Chemistry(all)

Cite this

Wills, A. W., Kang, M. S., Wentz, K. M., Hayes, S. E., Sahu, A., Gladfelter, W. L., & Norris, D. J. (2012). Synthesis and characterization of Al- and In-doped CdSe nanocrystals. Journal of Materials Chemistry, 22(13), 6335-6342. https://doi.org/10.1039/c2jm00068g

Synthesis and characterization of Al- and In-doped CdSe nanocrystals. / Wills, Andrew W.; Kang, Moon Sung; Wentz, Katherine M.; Hayes, Sophia E.; Sahu, Ayaskanta; Gladfelter, Wayne L.; Norris, David J.

In: Journal of Materials Chemistry, Vol. 22, No. 13, 07.04.2012, p. 6335-6342.

Research output: Contribution to journalArticle

Wills, AW, Kang, MS, Wentz, KM, Hayes, SE, Sahu, A, Gladfelter, WL & Norris, DJ 2012, 'Synthesis and characterization of Al- and In-doped CdSe nanocrystals', Journal of Materials Chemistry, vol. 22, no. 13, pp. 6335-6342. https://doi.org/10.1039/c2jm00068g
Wills AW, Kang MS, Wentz KM, Hayes SE, Sahu A, Gladfelter WL et al. Synthesis and characterization of Al- and In-doped CdSe nanocrystals. Journal of Materials Chemistry. 2012 Apr 7;22(13):6335-6342. https://doi.org/10.1039/c2jm00068g
Wills, Andrew W. ; Kang, Moon Sung ; Wentz, Katherine M. ; Hayes, Sophia E. ; Sahu, Ayaskanta ; Gladfelter, Wayne L. ; Norris, David J. / Synthesis and characterization of Al- and In-doped CdSe nanocrystals. In: Journal of Materials Chemistry. 2012 ; Vol. 22, No. 13. pp. 6335-6342.
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