Modelling exciton diffusion in disordered conjugated polymers


Athanasopoulos, S., Emelianova, E. V., Walker, A. B. and Beljonne, D., 2010. Modelling exciton diffusion in disordered conjugated polymers. Proceedings of SPIE - The International Society for Optical Engineering, 7722, 772214.

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    We present a combined quantum-chemical and Monte Carlo approach for calculating exciton transport properties in disordered organic materials starting from the molecular scale. We show that traps and energetic disorder are the main limitations for exciton diffusion in conjugated polymers. An analytical model for exciton hopping in a medium of sites with uncorellated energetic disorder gives a quantitative description on the dependence of the diffusion length to both the energetic disorder strength and temperature. We demonstrate how traps and energetic disorder can pin down the diffusion length in conjugated polymers to values below 10 nm.


    Item Type Articles
    CreatorsAthanasopoulos, S., Emelianova, E. V., Walker, A. B. and Beljonne, D.
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    URLURL Type
    DepartmentsFaculty of Science > Physics
    Publisher StatementAccepted_version.pdf: Copyright 2010 (year) Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
    ID Code20202
    Additional InformationOrganic Photonics IV. 12-15 April 2009. Brussels, Belgium.


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