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Science 28 March 2008:
Vol. 319. no. 5871, pp. 1776 - 1779
DOI: 10.1126/science.1143802
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Review

Doped Nanocrystals

David J. Norris,1* Alexander L. Efros,2 Steven C. Erwin2

The critical role that dopants play in semiconductor devices has stimulated research on the properties and the potential applications of semiconductor nanocrystals, or colloidal quantum dots, doped with intentional impurities. We review advances in the chemical synthesis of doped nanocrystals, in the theoretical understanding of the fundamental mechanisms that control doping, and in the creation of highly conducting nanocrystalline films. Because impurities can be used to alter the properties of nanoscale materials in desirable and controllable ways, doped nanocrystals can address key problems in applications from solar cells to bioimaging.

1 Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN 55455, USA.
2 Center for Computational Materials Science, Naval Research Laboratory, Washington, DC 20375, USA.

* To whom correspondence should be addressed. E-mail: dnorris{at}umn.edu

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