Formation of a heterojunction by electrophoretic deposition of CdTe/CdSe nanoparticles from an exhaustible source

Elisabeth Zillner, Jaison Kavalakkatt, Björn Eckhardt, Thomas Dittrich, Ahmed Ennaoui, Martha Lux-Steiner

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9 Citations (Scopus)

Abstract

Fast and well controlled electrophoretic deposition of CdTe and CdSe nanoparticle (CdTe-np and CdSe-np) layers and nanoparticle layer systems from an exhaustible source has been demonstrated. Using a small volume of pyridine based nanoparticle suspensions with varying concentrations, these were completely drained of nanoparticles during deposition. Our proposed approach is well suited to a practical realization of engineering materials with different band gaps for various promising applications such as fabrication of nanodevices. The formation of a charge selective contact across the CdTe-np/CdSe-np heterojunction was investigated by surface photovoltage methods and evidence of the separation of charge carriers at a CdTe-/CdSe-np heterojunction in-between was demonstrated.

Original languageEnglish
Pages (from-to)5500-5503
Number of pages4
JournalThin Solid Films
Volume520
Issue number17
DOIs
Publication statusPublished - 30 Jun 2012

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Keywords

  • Electrophoretic deposition
  • Nanoparticle
  • Surface photovoltage

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

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