Journal ArticleDOI
Electrical transport in doped polyacetylene
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TLDR
In this article, the results of an experimental study of electrical conductivity and thermopower in doped polyacetylene are reported, where measurements on both as‐grown and partially oriented films doped with iodine and AsF5; [CH(AsF5)y]x and [CH[I3]x, where y covers the full doping range.Abstract:
The results of an experimental study of electrical conductivity and thermopower in doped polyacetylene are reported. Included are measurements on both as‐grown and partially oriented films doped with iodine and AsF5; [CH(AsF5)y]xand [CH(I3)y]x, where y covers the full doping range. The data indicate three important concentration regimes; the dilute limit (y<0.001), the transitional region (0.001<y<0.01), and the metallic state (y≳0.01). In the dilute limit, the transport is via carrier hopping; the mobility is small (∼5×10−5 cm2/V sec) and activated (ΔE=0.3 eV). The semiconductor to metal transition is evident in the data and leads to a qualitative change in temperature dependence of the conductivity and to finite zero temperature values above yc?0.01–0.02. The transport mobility increases by five to six orders of magnitude on going through the transitional region. In the metallic state, the high mobility (∼60 cm2/V sec, assuming unit charge transfer) provides evidence of the validity of a band theory app...read more
Citations
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References
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Journal ArticleDOI
Solitons in polyacetylene
TL;DR: In this paper, the authors present a theoretical study of soliton formation in long-chain polyenes, including the energy of formation, length, mass, and activation energy for motion.
Journal ArticleDOI
Electrical Conductivity in Doped Polyacetylene.
C. K. Chiang,C. R. Fincher,Yung Woo Park,Alan J. Heeger,H. Shirakawa,E. J. Louis,S. C. Gau,Alan G. MacDiarmid +7 more
TL;DR: In this paper, a metal-to-insulator transition at dopant concentrations near 1% was shown for polyacetylene, a new class of conducting polymers in which the electrical conductivity can be systematically and continuously varied over a range of eleven orders of magnitude.
Journal ArticleDOI
Hopping Conductivity in Disordered Systems
TL;DR: In this paper, the authors considered a model in which charge is transported via phonon-induced tunneling of electrons between localized states which are randomly distributed in energy and position, and obtained an electrical conductivity of the form
Journal ArticleDOI
The theory of impurity conduction
Nevill Mott,W. D. Twose +1 more
TL;DR: In this article, the theory of impurity conduction was introduced and the following conclusions were drawn: 1) impurity can be inferred from impurity, and 2) impur-ture conduction can be predicted.
Journal ArticleDOI
Simultaneous polymerization and formation of polyacetylene film on the surface of concentrated soluble Ziegler-type catalyst solution
TL;DR: In this article, a direct method of simultaneously polymerizing and forming acetylene monomer to produce uniformly thin films of polyacetylene was investigated in terms of catalyst system, catalyst concentration, and polymerization temperature.