DOI: 10.1126/science.1084424. <i>n</i> -Type Conducting CdSe Nanocrystal Solids

n -Type Conducting CdSe Nanocrystal Solids

10.1126/science.1084424

Crossref journal-article

American Association for the Advancement of Science (AAAS)

Science (221)

Abstract

A bottleneck limiting the widespread application of semiconductor nanocrystal solids is their poor conductivity. We report that the conductivity of thin films of n -type CdSe nanocrystals increases by many orders of magnitude as the occupation of the first two electronic shells, 1S e and 1P e , increases, either by potassium or electrochemical doping. Around half-filling of the 1S e shell, a peak in the conductivity is observed, indicating shell-to-shell transport. Introducing conjugated ligands between nanocrystals increases the conductivities of these states to ∼10 – 2 siemens per centimeter.

Bibliography

Yu, D., Wang, C., & Guyot-Sionnest, P. (2003). n -Type Conducting CdSe Nanocrystal Solids. Science, 300(5623), 1277â1280.

Authors 3

Dong Yu (first)
Congjun Wang (additional)
Philippe Guyot-Sionnest (additional)

References 27 Referenced 510

10.1126/science.277.5334.1978
10.1126/science.287.5460.1989
10.1021/ar00174a003
10.1103/PhysRevB.54.17628
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10.1146/annurev.matsci.30.1.545
10.1063/1.1523148
10.1103/PhysRevB.62.2669
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10.1038/353737a0
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10.1063/1.120846
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P. Guyot-Sionnnest C. Wang J. Phys. Chem. B 10.1021/jp0275084 (2003).
The differential mobility is determined as μ = 10 – 2 ( w / L )(∂ G /∂ Q ) where w is the 5-μm gap between electrodes L is the 5-mm length of the electrode and the 10 – 2 factor accounts for the 50 pairs of electrodes.
D. J. Norris, M. G. Bawendi, Phys. Rev. B53, 16388 (1996). / Phys. Rev. B (1996)
We thank M. Shim and T. Downes for their earlier exploratory work on alkali metal doping in our laboratory. D.Y. was supported by the University of Chicago–Argonne National Laboratory Consortium for Nanoscience Research. C.W. was supported by the U.S. National Science Foundation (NSF) under grant DMR-0108101. Use of the MRSEC Shared Facilities was supported by NSF under grant DMR-0213745.

Dates

Type	When
Created	22 years, 3 months ago (May 22, 2003, 4:33 p.m.)
Deposited	1 year, 7 months ago (Jan. 9, 2024, 11:14 p.m.)
Indexed	1 week ago (Aug. 23, 2025, 12:59 a.m.)
Issued	22 years, 3 months ago (May 23, 2003)
Published	22 years, 3 months ago (May 23, 2003)
Published Print	22 years, 3 months ago (May 23, 2003)

Funders 0

None

BibTeX

@article{Yu_2003, title={n -Type Conducting CdSe Nanocrystal Solids}, volume={300}, ISSN={1095-9203}, url={http://dx.doi.org/10.1126/science.1084424}, DOI={10.1126/science.1084424}, number={5623}, journal={Science}, publisher={American Association for the Advancement of Science (AAAS)}, author={Yu, Dong and Wang, Congjun and Guyot-Sionnest, Philippe}, year={2003}, month=may, pages={1277–1280} }

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