@article{Garratt:2022:10.1038/s41467-022-31008-w,
author = {Garratt, D and Misiekis, L and Wood, D and Larsen, E and Matthews, M and Alexander, O and Ye, P and Jarosch, S and Ferchaud, C and Struber, C and Johnson, A and Bakulin, A and Penfold, T and Marangos, J},
doi = {10.1038/s41467-022-31008-w},
journal = {Nature Communications},
title = {Direct observation of ultrafast exciton localization in an organic semiconductor with soft X-ray transient absorption spectroscopy},
url = {http://dx.doi.org/10.1038/s41467-022-31008-w},
volume = {13},
year = {2022}
}

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TY  - JOUR
AB  - The localization dynamics of excitons in organic semiconductors influence the efficiency of charge transfer and separation in these materials. Here we apply time-resolved X-ray absorption spectroscopy to track photoinduced dynamics of a paradigmatic crystalline conjugated polymer: poly(3-hexylthiophene) (P3HT) commonly used in solar cell devices. The π→π transition, the first step of solar energy conversion, is pumped with a 15 fs optical pulse and the dynamics are probed by an attosecond soft X-ray pulse at the carbon K-edge. We observe X-ray spectroscopic signatures of the initially hot excitonic state, indicating that it is delocalized over multiple polymer chains. This undergoes a rapid evolution on a sub 50 fs timescale which can be directly associated with cooling and localization to form either a localized exciton or polaron pair.
AU  - Garratt,D
AU  - Misiekis,L
AU  - Wood,D
AU  - Larsen,E
AU  - Matthews,M
AU  - Alexander,O
AU  - Ye,P
AU  - Jarosch,S
AU  - Ferchaud,C
AU  - Struber,C
AU  - Johnson,A
AU  - Bakulin,A
AU  - Penfold,T
AU  - Marangos,J
DO  - 10.1038/s41467-022-31008-w
PY  - 2022///
SN  - 2041-1723
TI  - Direct observation of ultrafast exciton localization in an organic semiconductor with soft X-ray transient absorption spectroscopy
T2  - Nature Communications
UR  - http://dx.doi.org/10.1038/s41467-022-31008-w
UR  - http://hdl.handle.net/10044/1/97722
VL  - 13
ER  - 

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