BibTex format
@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}
}
RIS format (EndNote, RefMan)
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 -