TY - JOUR
T1 - Polaron spin dynamics in high-mobility polymeric semiconductors
AU - Schott, Sam
AU - Chopra, Uday
AU - Lemaur, Vincent
AU - Melnyk, Anton
AU - Olivier, Yoan
AU - Di Pietro, Riccardo
AU - Romanov, Igor
AU - Carey, Remington L.
AU - Jiao, Xuechen
AU - Jellett, Cameron
AU - Little, Mark
AU - Marks, Adam
AU - McNeill, Christopher R.
AU - McCulloch, Iain
AU - McNellis, Erik R.
AU - Andrienko, Denis
AU - Beljonne, David
AU - Sinova, Jairo
AU - Sirringhaus, Henning
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: Funding from ERC Synergy grant SC2 (no. 610115), the Alexander von Humboldt Foundation and the Transregional Collaborative Research Center (SFB/TRR) 173 SPIN+X is acknowledged. S.S. thanks the Winton Programme for the Physics of Sustainability and the Engineering and Physical Sciences Research Council (EPSRC) for funding as well as Z.-G. Yu for discussions, R. Chakalov for assistance with sample fabrication and S.-i. Kuroda, H. Tanaka and S. Watanabe for training and discussions. U.C. is a recipient of a DFG-funded position through the Excellence Initiative by the Graduate School Materials Science in Mainz (GSC 266). The work in Mons was supported by the European Commission/Région Wallonne (FEDER–BIORGEL project), the Consortium des Équipements de Calcul Intensif (CÉCI), funded by the Fonds National de la Recherche Scientifique (FRS-FNRS) under grant no. 2.5020.11 as well as the Tier-1 supercomputer of the Fédération Wallonie-Bruxelles, infrastructure funded by the Walloon Region under grant agreement n1117545, and FRS-FNRS. D.B. is FNRS Research Director. This research was undertaken in part on the SAXS/WAXS beamline at the Australian Synchrotron, part of ANSTO.
PY - 2019/6/3
Y1 - 2019/6/3
N2 - Polymeric semiconductors exhibit exceptionally long spin lifetimes, and recently observed micrometre spin diffusion lengths in conjugated polymers demonstrate the potential for organic spintronics devices. Weak spin–orbit and hyperfine interactions lie at the origin of their long spin lifetimes, but the coupling mechanism of a spin to its environment remains elusive. Here, we present a systematic study of polaron spin lifetimes in field-effect transistors with high-mobility conjugated polymers as an active layer. We demonstrate how spin relaxation is governed by the charges’ hopping motion at low temperatures, whereas an Elliott–Yafet-like relaxation due to a transient localization of the carrier wavefunctions is responsible for spin relaxation at high temperatures. In this regime, charge, spin and structural dynamics are intimately related and depend sensitively on the local conformation of polymer backbones and the crystalline packing of the polymer chains.
AB - Polymeric semiconductors exhibit exceptionally long spin lifetimes, and recently observed micrometre spin diffusion lengths in conjugated polymers demonstrate the potential for organic spintronics devices. Weak spin–orbit and hyperfine interactions lie at the origin of their long spin lifetimes, but the coupling mechanism of a spin to its environment remains elusive. Here, we present a systematic study of polaron spin lifetimes in field-effect transistors with high-mobility conjugated polymers as an active layer. We demonstrate how spin relaxation is governed by the charges’ hopping motion at low temperatures, whereas an Elliott–Yafet-like relaxation due to a transient localization of the carrier wavefunctions is responsible for spin relaxation at high temperatures. In this regime, charge, spin and structural dynamics are intimately related and depend sensitively on the local conformation of polymer backbones and the crystalline packing of the polymer chains.
UR - http://hdl.handle.net/10754/656373
UR - http://www.nature.com/articles/s41567-019-0538-0
UR - http://www.scopus.com/inward/record.url?scp=85066980846&partnerID=8YFLogxK
U2 - 10.1038/s41567-019-0538-0
DO - 10.1038/s41567-019-0538-0
M3 - Article
VL - 15
SP - 814
EP - 822
JO - Nature Physics
JF - Nature Physics
SN - 1745-2473
IS - 8
ER -