Nanoscale control of layer thickness for EL devices by mass-controlled layer-by-layer sequential adsorption process

Seimei Shiratori, Masayoshi Yamada, Takahiro Ito, Tom C. Wang, Michael F. Rubner

Research output: Contribution to journalConference article


A mass controlled layer-by-layer sequential adsorption process for polyelectrolytes was newly developed for the fabrication of functional devices using ultra-thin organic film formed by various polymers of different polarity of charge. In this study hydrophobic Ruthenium complex monomer (tris(bipyridyl) ruthenium(II) hexafluorophosphate) was micelle-wrapped with an anionic surfactant, sodium dodecylbenzenesulfonate, and was assembled with PAH (poly (allylamine hydrochloride)), which has the opposite charge, on ITO substrates. With this method, we succeeded in fabricating ultra-thin organic films even when the adsorption material is not polymer but monomer. Moreover it was found that the film thickness of the self-assembled Ru micelle/PAH had a linear relationship with the number of bilayers. By using this process, an EL device was fabricated by depositing the thin film of micelle-wrapping ruthenium complex monomer on ITO and metal electrode on top of the film. Light emission was observed by applying voltage to this device.

Original languageEnglish
Pages (from-to)BB1.9.1-BB1.9.6
JournalMaterials Research Society Symposium - Proceedings
Publication statusPublished - 2000 Dec 1
EventElectrical, Optical, and Magnetic Properties of Organic Solid-State Materials V - Boston, MA, USA
Duration: 2000 Nov 292000 Dec 3


ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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