Electrochromic Metallo-Organic Nanoscale Films: Fabrication, Color Range, and Devices

Neta Elool Dov, Sreejith Shankar, Dana Cohen, Tatyana Bendikov, Katya Rechav, Linda J.W. Shimon, Michal Lahav, Milko E. Van Der Boom

Research output: Contribution to journalArticlepeer-review

61 Citations (Scopus)


In this study, we demonstrate a versatile approach for the formation of electrochromic nanoscale assemblies on transparent conductive oxides on both rigid and flexible substrates. Our method is based on the application of alternating spin-coated layers of well-defined metal polypyridyl complexes and a palladium(II) salt to form electrochemically addressable films with a high chromophore density. By varying the central metal ion of the polypyridyl complexes (Os, Ru, and Fe) and their ligands and by mixing these complexes, coatings with a wide range of colors can be achieved. These coatings cover a large area of RGB color space. The coloration intensities of these nanoscale films can be tuned by the number of deposition steps. The materials have very attractive ON/OFF ratios, electrochemical stabilities, and coloration efficiencies. Reversible color-to-colorless and color-to-color transitions were demonstrated, and the films were further integrated into sandwich cells.

Original languageEnglish
Pages (from-to)11471-11481
Number of pages11
JournalJournal of the American Chemical Society
Issue number33
Publication statusPublished - Aug 23 2017

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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