Abstract
In this Chapter we shall establish the different laws required for electrical conductivity within a band scheme for organic solids (Appendix A-6 summarises laws for thermoelectrical power). Organic solids can be deemed semiconductors, or in more general terms conductors, especially when considering certain π-conjugated polymers undergoing development at the present time. The laws depend upon the nature of the conduction states involved, which in turn may be due to:
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valence and conduction band delocalised states (HOMO and LUMO bands in strong bonds);
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localised states associated with disorder that governs the depths of wells;
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states localised around the Fermi level in which transport mechanisms by hopping (Hopping to Nearest Neighbour, or HNN) or tunnelling effects (Variable Range Hopping, or VRH) appear; and
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polaronic states due to the localisation of carriers in wells with depths dependent on the ability of the lattice to deform, and with different laws appearing as a function of temperature domain.
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(2006). Electronic transport properties: I Conduction in delocalised, localised and polaronic states. In: Optoelectronics of Molecules and Polymers. Springer Series in Optical Sciences, vol 104. Springer, New York, NY. https://doi.org/10.1007/978-0-387-25103-5_5
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DOI: https://doi.org/10.1007/978-0-387-25103-5_5
Publisher Name: Springer, New York, NY
Print ISBN: 978-0-387-23710-7
Online ISBN: 978-0-387-25103-5
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