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Published September 7, 1990 | public
Journal Article

Thin Films of n-Si/Poly-(CH₃)₃Si-Cyclooctatetraene: Conducting-Polymer Solar Cells and Layered Structures


The optical and electronic properties of thin films of the solution-processible polymer poly-(CH₃)₃Si-cyclooctatetraene are presented. This conjugated polymer is based on a polyacetylene backbone with (CH₃)3Si side groups. Thin transparent films have been cast onto n-doped silicon (n-Si) substrates and doped with iodine to form surface-barrier solar cells. The devices produce photovoltages that are at the theoretical limit and that are much greater than can be obtained from n-Si contacts with conventional metals. Two methods for forming layered polymeric materials, one involving the spin-coating of preformed polymers and the other comprising the sequential polymerization of different monomers, are also described. An organic polymer analog of a metal/insulator/metal capacitor has been constructed with the latter method.

Additional Information

© 1990 by the American Association for the Advancement of Science. Supported by NSF grant CHE-8814694 and ONR grant N00014-88-K-0208. C.B.G. thanks the Jet Propulsion Laboratory, Caltech, for a research fellowship. E.J.G. thanks IBM for a graduate fellowship, ands A.K. thanks the Department of Education for a graduate fellowship. Contribution 8134 from the Arnold and Mabel Beckman Laboratory of Synthesis and the Arthur Amos Noyes Laboratory of Chemical Physics.

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October 18, 2023