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 journalArticle

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 languageEnglish (US)
Pages (from-to)13-21
Number of pages9
JournalJournal of Experimental Nanoscience
Volume2
Issue number1-2
DOIs
StatePublished - Mar 1 2007

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Biomedical Engineering
  • Materials Science(all)

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