Issue 5, 2011

Exciton diffusion and charge transfer dynamics in nano phase-separated P3HT/PCBM blend films

Abstract

Exciton quenching dynamics has been systematically studied in pristine P3HT and nano phase separated P3HT/PCBM blend films under various excitation intensities by femtosecond fluorescence up-conversion technique. The behaviors of excitons in the films can be well described by a three-dimensional diffusion model. The small diffusion length and large charge transfer radius indicate that excitons reach the interface most likely by the delocalization of the excitons in P3HT fibrillar at a range of 4.8–9 nm so that the excitons can quickly delocalize in the P3HT domain to reach the interface (instead of by diffusion).

Graphical abstract: Exciton diffusion and charge transfer dynamics in nano phase-separated P3HT/PCBM blend films

Supplementary files

Article information

Article type
Paper
Submitted
18 Dec 2010
Accepted
06 Mar 2011
First published
13 Apr 2011

Nanoscale, 2011,3, 2280-2285

Exciton diffusion and charge transfer dynamics in nano phase-separated P3HT/PCBM blend films

H. Wang, H. Wang, B. Gao, L. Wang, Z. Yang, X. Du, Q. Chen, J. Song and H. Sun, Nanoscale, 2011, 3, 2280 DOI: 10.1039/C0NR01002B

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