Abstract
One dimensional molecular packing and the polar nature of their excited states are characteristic features of charge transfer (CT) crystals. Both properties lead to unique band structures where excitonic states and free electron hole pair levels are in close proximity and thus give rise to interesting photoelectric properties. Spectroscopic data and transport measurements are presented which document the polar nature of the excited state and which show that electron hole separation processes are more efficient in CT crystal than in normal anthracene-like molecular crystals. A special feature of CT crystals, their one dimensionality, is discussed in detail. It is shown by microscopic experiments on charge carrier trapping that the anisotropy in these materials can be quite large (100:1). This anisotropy is mostly masked in straght-forward macroscopic mobility experiments.
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© 1979 Friedr. Vieweg & Sohn Verlagsgesellschaft mbH
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Haarer, D. (1979). Optical and photoelectric properties of organic charge transfer crystals. In: Treusch, J. (eds) Festkörperprobleme 20. Advances in Solid State Physics, vol 20. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0116748
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DOI: https://doi.org/10.1007/BFb0116748
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