In situ optical measurement of charge transport dynamics in organic photovoltaics

Chow, P. C. Y., Bayliss, S. L. , Lakhwani, G., Greenham, N. C. and Friend, R. H. (2015) In situ optical measurement of charge transport dynamics in organic photovoltaics. Nano Letters, 15(2), pp. 931-935. (doi: 10.1021/nl503687u) (PMID:25585168)

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We present a novel experimental approach which allows extraction of both spatial and temporal information on charge dynamics in organic solar cells. Using the wavelength dependence of the photonic structure in these devices, we monitor the change in spatial overlap between the photogenerated hole distribution and the optical probe profile as a function of time. In a model system we find evidence for a buildup of the photogenerated hole population close to the hole-extracting electrode on a nanosecond time scale and show that this can limit charge transport through space-charge effects under operating conditions.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Bayliss, Dr Sam
Authors: Chow, P. C. Y., Bayliss, S. L., Lakhwani, G., Greenham, N. C., and Friend, R. H.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:Nano Letters
Publisher:American Chemical Society
ISSN (Online):1530-6992
Published Online:23 January 2015

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