Synthesis and characterization of lead selenide nanocrystal quantum dots and wires

Weonsik Seo, Ju Hyung Yun, Yun Chang Park, Chang-Soo Han, Jihye Lee, Sohee Jeong

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Lead chalcogenide nanocrystalline materials offer possibilities of improving the efficiency of various optoelectric/thermoelectric applications, especially in solar cells, by generating more carriers with incoming photons, or by extending the bandgap toward the infra-red region. In this work, we suggest the synthetic approach of creating extended PbSe structures which shows better performances when incorporated into an electric device. Firstly, we synthesized monodisperse cubic-structured single-crystalline lead selenide nanocrystal quantum dots using lead acetate and oleic acid in noncoordinating solvent without additional surfactants. Also, single-crystal cubic PbSe nanowires were synthesized in a mixture of surfactants such as trioctylphosphine and phenyl ether. Morphologies of wires and dots were precisely controlled via reaction temperature and the surface ligands. Phenyl ether was found to facilitate the oriented attachment. Further, current-voltage characteristics of drop-casted 2D arrays of nanocrystalline materials were examined.

Original languageEnglish
Pages (from-to)4347-4350
Number of pages4
JournalJournal of Nanoscience and Nanotechnology
Volume11
Issue number5
DOIs
Publication statusPublished - 2011 May 1
Externally publishedYes

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Keywords

  • Colloidal synthesis
  • Lead selenide nanocrystal quantum dot
  • Nanowire

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Chemistry(all)
  • Materials Science(all)
  • Bioengineering
  • Biomedical Engineering

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