@article{Vella:2016:10.1038/srep29437,
author = {Vella, E and Li, H and Grégoire, P and Tuladhar, SM and Vezie, MS and Few, SPM and Bazán, CM and Nelson, J and Silva-Acuña, C and Bittner, ER},
doi = {10.1038/srep29437},
journal = {Scientific Reports},
title = {Ultrafast decoherence dynamics govern photocarrier generation efficiencies in polymer solar cells},
url = {http://dx.doi.org/10.1038/srep29437},
volume = {6},
year = {2016}
}

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TY  - JOUR
AB  - All-organic-based photovoltaic solar cells have attracted considerable attention because of their lowcostprocessing and short energy payback time. In such systems the primary dissociation of an opticalexcitation into a pair of photocarriers has been recently shown to be extremely rapid and efficient,but the physical reason for this remains unclear. Here, two-dimensional photocurrent excitationspectroscopy, a novel non-linear optical spectroscopy, is used to probe the ultrafast coherent decayof photoexcitations into charge-producing states in a polymer:fullerene based solar cell. The twodimensionalphotocurrent spectra are interpreted by introducing a theoretical model for the descriptionof the coupling of the electronic states of the system to an external environment and to the appliedlaser fields. The experimental data show no cross-peaks in the twodimensional photocurrent spectra, aspredicted by the model for coherence times between the exciton and the photocurrent producing statesof 20fs or less.
AU  - Vella,E
AU  - Li,H
AU  - Grégoire,P
AU  - Tuladhar,SM
AU  - Vezie,MS
AU  - Few,SPM
AU  - Bazán,CM
AU  - Nelson,J
AU  - Silva-Acuña,C
AU  - Bittner,ER
DO  - 10.1038/srep29437
PY  - 2016///
SN  - 2045-2322
TI  - Ultrafast decoherence dynamics govern photocarrier generation efficiencies in polymer solar cells
T2  - Scientific Reports
UR  - http://dx.doi.org/10.1038/srep29437
UR  - http://hdl.handle.net/10044/1/37394
VL  - 6
ER  - 

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