Conductive atomic force microscopy (C-AFM) analysis of photoactive layers in inert atmosphere

Alexander Alexeev, Joachim Loos

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

Conductive atomic force microscopy (C-AFM) measurements have been performed on the MDMO-PPV/PCBM system which is potentially interesting for applications as active layer in polymer solar cells (PSCs). It is demonstrated that C-AFM analysis performed in air for ambient conditions provides only inadequate information about the local electrical properties. The main reason is that the samples chemically degrade when in contact with air. Moreover, we speculate that also the adsorbed water layer interferes with reliable nanoscale electrical measurements. In contrast, when performed in inert atmosphere C-AFM analysis offers consistent results of e.g. the I-V characteristics with lateral resolution better than 50 nm, and is able to detect local heterogeneities of these I-V characteristics at the sample surface.

Original languageEnglish
Pages (from-to)149-154
Number of pages6
JournalOrganic Electronics
Volume9
Issue number1
DOIs
Publication statusPublished - Feb 2008

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Keywords

  • Conductive atomic force microscopy
  • Inert atmosphere
  • Morphology
  • Photoactive layer
  • Polymer solar cell

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry
  • Electrical and Electronic Engineering

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