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    Polyfluorene as a model system for space-charge-limited conduction

    Arif, Mohammad, 1974-
    Yun, Minseong, 1978-
    Gangopadhyay, Shubhra
    Ghosh, K.
    Fadiga, L.
    Galbrecht, F.
    Scherf, Ullrich
    Guha, Suchi
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    [PDF] PolyfluoreneModelSystemSpace.pdf (403.2Kb)
    Date
    2008
    Format
    Article
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    Abstract
    Ethyl-hexyl substituted polyfluorene (PF) with its high level of molecular disorder can be described very well by one-carrier space-charge-limited conduction for a discrete set of trap levels with energy $\sim$ 0.5 eV above the valence band edge. Sweeping the bias above the trap-filling limit in the as-is polymer generates a new set of exponential traps, which is clearly seen in the density of states calculations. The trapped charges in the new set of traps have very long lifetimes and can be detrapped by photoexcitation. Thermal cycling the PF film to a crystalline phase prevents creation of additional traps at higher voltages.
    URI
    http://hdl.handle.net/10355/6805
    Citation
    arXiv:cond-mat/0703554v1
    Rights
    OpenAccess.
    This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License.
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    • Physics and Astronomy publications (MU)
    • Electrical Engineering and Computer Science publications (MU)

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