BibTex format
@article{Pagano:2024:10.1038/s41467-024-50530-7,
author = {Pagano, K and Kim, JG and Luke, J and Tan, E and Stewart, K and Sazanovich, I and Karras, G and Gonev, H and Marsh, A and Kim, NY and Kwon, S and Kim, YY and Alonso, M and Dorling, B and Campoy-Quiles, M and Parker, A and Clarke, T and Kim, Y-H and Kim, J-S},
doi = {10.1038/s41467-024-50530-7},
journal = {Nature Communications},
title = {Slow vibrational relaxation drives ultrafast formation of photoexcited polaron pair states in glycolated conjugated polymers},
url = {http://dx.doi.org/10.1038/s41467-024-50530-7},
volume = {15},
year = {2024}
}
RIS format (EndNote, RefMan)
TY - JOUR
AB - Glycol sidechains are often used to enhance the performance of organic photoconversion and electrochemical devices. Herein, we study their effects on electronic states and electronic properties. We find that polymer glycolation not only induces more disordered packing, but also results in a higher reorganisation energy due to more localised π-electron density. Transient absorption spectroscopy and femtosecond stimulated Raman spectroscopy are utilised to monitor the structural relaxation dynamics coupled to the excited state formation upon photoexcitation. Singlet excitons are initially formed, followed by polaron pair formation. The associated structural relaxation slows down in glycolated polymers (5 ps vs. 1.25 ps for alkylated), consistent with larger reorganisation energy. This slower vibrational relaxation is found to drive ultrafast formation of the polaron pair state (5 ps vs. 10 ps for alkylated). These results provide key experimental evidence demonstrating the impact of molecular structure on electronic state formation driven by strong vibrational coupling.
AU - Pagano,K
AU - Kim,JG
AU - Luke,J
AU - Tan,E
AU - Stewart,K
AU - Sazanovich,I
AU - Karras,G
AU - Gonev,H
AU - Marsh,A
AU - Kim,NY
AU - Kwon,S
AU - Kim,YY
AU - Alonso,M
AU - Dorling,B
AU - Campoy-Quiles,M
AU - Parker,A
AU - Clarke,T
AU - Kim,Y-H
AU - Kim,J-S
DO - 10.1038/s41467-024-50530-7
PY - 2024///
SN - 2041-1723
TI - Slow vibrational relaxation drives ultrafast formation of photoexcited polaron pair states in glycolated conjugated polymers
T2 - Nature Communications
UR - http://dx.doi.org/10.1038/s41467-024-50530-7
UR - https://www.nature.com/articles/s41467-024-50530-7
UR - http://hdl.handle.net/10044/1/113163
VL - 15
ER -
