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Volume: 42 | Article ID: art00014
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Carrier Transport Properties in Polysilanes with Various Molecular Weights
  DOI :  10.2352/J.ImagingSci.Technol.1998.42.4.art00014  Published OnlineJuly 1998
Abstract

Carrier transport properties in poly(methylphenylsilane) films were studied with interest focusing on the variation of Bässler's disorder parameters with changing molecular weights. There was no apparent correlation between the charge transport properties and the molecular density and free volume of the samples, the latter being measured by a positron annihilation technique. This result led us to a model explaining the variation in Σ with changing molecular weights, a model which is based on a hypothesis that ca. 10 silylene units at the end of a polymer chain do not participate in forming a σ-conjugated domain. The validity of this model was demonstrated by UV absorption measurements. The variation of μ0 was interpreted in terms of the partial orientation of the main chains induced by the mechanical force applied by a bar-coater. It is discussed that μ0 is sensitive to even the slightest orientation of the main chains while the other disorder parameters are not.

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Tomomi Nakamura, Kunio Oka, Fuminobu Hori, Ryuichiro Oshima, Hiroyoshi Naito, Takaaki Dohmaru, "Carrier Transport Properties in Polysilanes with Various Molecular Weightsin Journal of Imaging Science and Technology,  1998,  pp 364 - 369,  https://doi.org/10.2352/J.ImagingSci.Technol.1998.42.4.art00014

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