Developing PbSe/PbS core-shell nanocrystals quantum dots toward their potential heterojunction applications

Dehu Cui; Jian Xu; Gary Paradee; Shengyong Xu; Andrew Wang

doi:10.1080/17458080600935590

Developing PbSe/PbS core-shell nanocrystals quantum dots toward their potential heterojunction applications

Dehu Cui, Jian Xu, Gary Paradee, Shengyong Xu, Andrew Wang

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

We report in this article the epitaxial growth of PbS shells over PbSe nanocrystal quantum dots (NQDs) with monolayer-precision. The core-shell infrared NQDs were ligand-exchanged with short-chain octylamine, and the photoluminescence efficiency of the surface-engineered core-shell nanoparticles was substantially higher than that of the plain-core structures undergoing the same surface processing, which reveals less ligand-dependence and enhanced chemical robustness in the core-shell NQDs. The reported results could potentially open up the possibility of incorporating semiconductor infrared NQDs in the silicon matrix to develop all-inorganic light emitting heterojunctions on silicon substrates.

Original language	English (US)
Pages (from-to)	13-21
Number of pages	9
Journal	Journal of Experimental Nanoscience
Volume	2
Issue number	1-2
DOIs	https://doi.org/10.1080/17458080600935590
State	Published - Mar 2007

All Science Journal Classification (ASJC) codes

Bioengineering
Biomedical Engineering
Materials Science(all)

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10.1080/17458080600935590

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title = "Developing PbSe/PbS core-shell nanocrystals quantum dots toward their potential heterojunction applications",

abstract = "We report in this article the epitaxial growth of PbS shells over PbSe nanocrystal quantum dots (NQDs) with monolayer-precision. The core-shell infrared NQDs were ligand-exchanged with short-chain octylamine, and the photoluminescence efficiency of the surface-engineered core-shell nanoparticles was substantially higher than that of the plain-core structures undergoing the same surface processing, which reveals less ligand-dependence and enhanced chemical robustness in the core-shell NQDs. The reported results could potentially open up the possibility of incorporating semiconductor infrared NQDs in the silicon matrix to develop all-inorganic light emitting heterojunctions on silicon substrates.",

author = "Dehu Cui and Jian Xu and Gary Paradee and Shengyong Xu and Andrew Wang",

note = "Funding Information: J. Xu would like to thank Dr Thomas E. Mallouk, DuPont Professor of Materials Chemistry and Physics at the Penn State University, for the experimental help on the synthesis of semiconductor nanocrystals. The authors also thank Dr Michael Gerhold for helpful discussions on the device applications of PbSe NQDs. This work was supported by the US Army Research Office under Contract No. DAAD19-02-D-0001, and by the National Science Foundation of USA under grant DMR-0213623.",

year = "2007",

month = mar,

doi = "10.1080/17458080600935590",

language = "English (US)",

volume = "2",

pages = "13--21",

journal = "Journal of Experimental Nanoscience",

issn = "1745-8080",

publisher = "Taylor and Francis Ltd.",

number = "1-2",

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TY - JOUR

T1 - Developing PbSe/PbS core-shell nanocrystals quantum dots toward their potential heterojunction applications

AU - Cui, Dehu

AU - Xu, Jian

AU - Paradee, Gary

AU - Xu, Shengyong

AU - Wang, Andrew

N1 - Funding Information: J. Xu would like to thank Dr Thomas E. Mallouk, DuPont Professor of Materials Chemistry and Physics at the Penn State University, for the experimental help on the synthesis of semiconductor nanocrystals. The authors also thank Dr Michael Gerhold for helpful discussions on the device applications of PbSe NQDs. This work was supported by the US Army Research Office under Contract No. DAAD19-02-D-0001, and by the National Science Foundation of USA under grant DMR-0213623.

PY - 2007/3

Y1 - 2007/3

N2 - We report in this article the epitaxial growth of PbS shells over PbSe nanocrystal quantum dots (NQDs) with monolayer-precision. The core-shell infrared NQDs were ligand-exchanged with short-chain octylamine, and the photoluminescence efficiency of the surface-engineered core-shell nanoparticles was substantially higher than that of the plain-core structures undergoing the same surface processing, which reveals less ligand-dependence and enhanced chemical robustness in the core-shell NQDs. The reported results could potentially open up the possibility of incorporating semiconductor infrared NQDs in the silicon matrix to develop all-inorganic light emitting heterojunctions on silicon substrates.

AB - We report in this article the epitaxial growth of PbS shells over PbSe nanocrystal quantum dots (NQDs) with monolayer-precision. The core-shell infrared NQDs were ligand-exchanged with short-chain octylamine, and the photoluminescence efficiency of the surface-engineered core-shell nanoparticles was substantially higher than that of the plain-core structures undergoing the same surface processing, which reveals less ligand-dependence and enhanced chemical robustness in the core-shell NQDs. The reported results could potentially open up the possibility of incorporating semiconductor infrared NQDs in the silicon matrix to develop all-inorganic light emitting heterojunctions on silicon substrates.

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DO - 10.1080/17458080600935590

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JO - Journal of Experimental Nanoscience

JF - Journal of Experimental Nanoscience

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ER -

Developing PbSe/PbS core-shell nanocrystals quantum dots toward their potential heterojunction applications

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