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Issue 13, 2012
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Synthesis and characterization of Al- and In-doped CdSe nanocrystals

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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.

Graphical abstract: Synthesis and characterization of Al- and In-doped CdSe nanocrystals

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Article information


Submitted
04 Jan 2012
Accepted
14 Feb 2012
First published
21 Feb 2012

J. Mater. Chem., 2012,22, 6335-6342
Article type
Paper

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

A. W. Wills, M. S. Kang, K. M. Wentz, S. E. Hayes, A. Sahu, W. L. Gladfelter and D. J. Norris, J. Mater. Chem., 2012, 22, 6335
DOI: 10.1039/C2JM00068G

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