Developing PbSe/PbS core-shell nanocrystals quantum dots (NQDs) for NQD/silicon heterojunctions

Jian Xu, Cui Dehu, Xu Shengyong, Gary Paradee, Zhang Fan, Zhu Ting

Research output: Contribution to conferencePaper

Abstract

We report in this paper 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 octadmine, 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 languageEnglish (US)
Pages113-116
Number of pages4
StatePublished - Dec 8 2006
Event2006 NSTI Nanotechnology Conference and Trade Show - NSTI Nanotech 2006 Technical Proceedings - Boston, MA, United States
Duration: May 7 2006May 11 2006

Other

Other2006 NSTI Nanotechnology Conference and Trade Show - NSTI Nanotech 2006 Technical Proceedings
CountryUnited States
CityBoston, MA
Period5/7/065/11/06

Fingerprint

Nanocrystals
Semiconductor quantum dots
Heterojunctions
Silicon
Ligands
Infrared radiation
Epitaxial growth
Monolayers
Photoluminescence
Semiconductor materials
Nanoparticles
Substrates
Processing

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Xu, J., Dehu, C., Shengyong, X., Paradee, G., Fan, Z., & Ting, Z. (2006). Developing PbSe/PbS core-shell nanocrystals quantum dots (NQDs) for NQD/silicon heterojunctions. 113-116. Paper presented at 2006 NSTI Nanotechnology Conference and Trade Show - NSTI Nanotech 2006 Technical Proceedings, Boston, MA, United States.
Xu, Jian ; Dehu, Cui ; Shengyong, Xu ; Paradee, Gary ; Fan, Zhang ; Ting, Zhu. / Developing PbSe/PbS core-shell nanocrystals quantum dots (NQDs) for NQD/silicon heterojunctions. Paper presented at 2006 NSTI Nanotechnology Conference and Trade Show - NSTI Nanotech 2006 Technical Proceedings, Boston, MA, United States.4 p.
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abstract = "We report in this paper 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 octadmine, 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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year = "2006",
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Xu, J, Dehu, C, Shengyong, X, Paradee, G, Fan, Z & Ting, Z 2006, 'Developing PbSe/PbS core-shell nanocrystals quantum dots (NQDs) for NQD/silicon heterojunctions' Paper presented at 2006 NSTI Nanotechnology Conference and Trade Show - NSTI Nanotech 2006 Technical Proceedings, Boston, MA, United States, 5/7/06 - 5/11/06, pp. 113-116.

Developing PbSe/PbS core-shell nanocrystals quantum dots (NQDs) for NQD/silicon heterojunctions. / Xu, Jian; Dehu, Cui; Shengyong, Xu; Paradee, Gary; Fan, Zhang; Ting, Zhu.

2006. 113-116 Paper presented at 2006 NSTI Nanotechnology Conference and Trade Show - NSTI Nanotech 2006 Technical Proceedings, Boston, MA, United States.

Research output: Contribution to conferencePaper

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T1 - Developing PbSe/PbS core-shell nanocrystals quantum dots (NQDs) for NQD/silicon heterojunctions

AU - Xu, Jian

AU - Dehu, Cui

AU - Shengyong, Xu

AU - Paradee, Gary

AU - Fan, Zhang

AU - Ting, Zhu

PY - 2006/12/8

Y1 - 2006/12/8

N2 - We report in this paper 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 octadmine, 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 paper 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 octadmine, 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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Xu J, Dehu C, Shengyong X, Paradee G, Fan Z, Ting Z. Developing PbSe/PbS core-shell nanocrystals quantum dots (NQDs) for NQD/silicon heterojunctions. 2006. Paper presented at 2006 NSTI Nanotechnology Conference and Trade Show - NSTI Nanotech 2006 Technical Proceedings, Boston, MA, United States.