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Binding Characteristics of Surface Ligands on PbSe QDs and Impact on Electrical Conductivity

Published online by Cambridge University Press:  15 March 2011

Won Jin Kim ,
Sung Jin Kim ,
Jangwon Seo ,
Y. Sahoo ,
A. N. Cartwright ,
Kwang-Sup Lee  and
Paras N. Prasad
Won Jin Kim
Affiliation:
Institute for Lasers, Photonics and Biophotonics, University at Buffalo, Buffalo, New York 14260, USA
Sung Jin Kim
Affiliation:
Institute for Lasers, Photonics and Biophotonics, University at Buffalo, Buffalo, New York 14260, USA Department of Chemistry, University at Buffalo, Buffalo, New York 14260, USA
Jangwon Seo
Affiliation:
Institute for Lasers, Photonics and Biophotonics, University at Buffalo, Buffalo, New York 14260, USA
Y. Sahoo
Affiliation:
Institute for Lasers, Photonics and Biophotonics, University at Buffalo, Buffalo, New York 14260, USA
A. N. Cartwright
Affiliation:
Institute for Lasers, Photonics and Biophotonics, University at Buffalo, Buffalo, New York 14260, USA Department of Chemistry, University at Buffalo, Buffalo, New York 14260, USA
Kwang-Sup Lee
Affiliation:
Institute for Lasers, Photonics and Biophotonics, University at Buffalo, Buffalo, New York 14260, USA Department of Advanced Materials, Hannam University, Daejeon 305-811, Korea
Paras N. Prasad
Affiliation:
Institute for Lasers, Photonics and Biophotonics, University at Buffalo, Buffalo, New York 14260, USA Department of Chemistry, University at Buffalo, Buffalo, New York 14260, USA Department of Electrical Engineering, University at Buffalo, Buffalo, New York 14260, USA
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Abstract

We report the binding and conductivity characteristics of PbSe nanocrystal quantum dots which have different ligands on the surface. The PbSe nanocrystal quantum dots were surface functionalized using chemical treatment. The results of post-treatment analysis show that the PbSe surface can be successfully functionalized with various ligands based on thiol- and amine-molecules (e.g., oleic acid, dodecanethiol and butylamine). Conductivity measurements performed using a metal-semiconductor-metal structure indicate that there is an increase of conductivity as the length of the ligand connecting the quantum dots is reduced.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1113: Symposium F – Low-Cost Solution-Based Deposition of Inorganic Films for Electronic/Photonic Devices , 2008 , 1113-F03-09
Copyright
Copyright © Materials Research Society 2009

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References

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