Soluble polyacetylenes derived from the ring-opening metathesis polymerization (ROMP) of substituted cyclooctatetraenes. Electrochemical characterization and Schottky barrier devices

Thomas H. Jozefiak, Michael J. Sailor, Eric J. Ginsburg, Christopher B. Gorman, Nathan S Lewis, Robert H. Grubbs

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Recent developments in ring-opening metathesis polymerization (ROMP) have enabled the synthesis of poly-cyclooctatetraene (poly-COT), a material which is isostructural to polyacetylene. This liquid-phase polymerization method allows facile construction of interfaces, films, and devices with polyacetylene-like materials. The ROMP method also allows the preparation of soluble, yet highly conjugated polyacetylene analogs from substituted cyclooctatetraenes (R-COT). The redox characteristics of R-COT polymers were investigated at electrodes modified with thin polymer films. Voltammetric methods were used to characterize the redox response, band gap, electrochemical doping, and cis-trans isomerization properties of these polyenes. We have applied poly-COT technology to the fabrication of Schottky diodes and photoelectrochemical cells, by forming poly-COT films on semiconductor surfaces. The resultant semiconductor/organic-metal interfaces behave more ideally than semiconductor contacts with conventional metals, in that changes in the work function of the conducting polymer exert a large and predictable effect on the electrical properties of the resulting Schottky diodes. Transparent films of the solution-processible polymer poly-trimethylsilyl-cyclooctatetraene (poly-TMS-COT) have been cast onto n-silicon substrates and doped with iodine to form surface barrier solar cells. These devices produce photovoltages that are much larger than can be obtained from n-silicon contacts with conventional metals.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
EditorsMarcus F. Lawrence, Arthur J. Frank, S. Ramasesha, Carl C. Wamser
PublisherPubl by Int Soc for Optical Engineering
Pages8-19
Number of pages12
Volume1436
Publication statusPublished - 1991
EventPhotochemistry and Photoelectrochemistry of Organic and Inorganic Molecular Thin Films - Los Angeles, CA, USA
Duration: Jan 23 1991Jan 24 1991

Other

OtherPhotochemistry and Photoelectrochemistry of Organic and Inorganic Molecular Thin Films
CityLos Angeles, CA, USA
Period1/23/911/24/91

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ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Jozefiak, T. H., Sailor, M. J., Ginsburg, E. J., Gorman, C. B., Lewis, N. S., & Grubbs, R. H. (1991). Soluble polyacetylenes derived from the ring-opening metathesis polymerization (ROMP) of substituted cyclooctatetraenes. Electrochemical characterization and Schottky barrier devices. In M. F. Lawrence, A. J. Frank, S. Ramasesha, & C. C. Wamser (Eds.), Proceedings of SPIE - The International Society for Optical Engineering (Vol. 1436, pp. 8-19). Publ by Int Soc for Optical Engineering.