Modelling exciton diffusion in disordered conjugated polymers

S. Athanasopoulos; E. V. Emelianova; A. B. Walker; D. Beljonne

doi:10.1117/12.854434

18 May 2010 Modelling exciton diffusion in disordered conjugated polymers

S. Athanasopoulos, E. V. Emelianova, A. B. Walker, D. Beljonne

Proceedings Volume 7722, Organic Photonics IV; 772214 (2010) https://doi.org/10.1117/12.854434
Event: SPIE Photonics Europe, 2010, Brussels, Belgium

Abstract

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.

Citation Download Citation

S. Athanasopoulos, E. V. Emelianova, A. B. Walker, and D. Beljonne "Modelling exciton diffusion in disordered conjugated polymers", Proc. SPIE 7722, Organic Photonics IV, 772214 (18 May 2010); https://doi.org/10.1117/12.854434

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