Polaron spin dynamics in high-mobility polymeric semiconductors
| Autor: | Schott, Sam, Chopra, Uday, Lemaur, Vincent, Melnyk, Anton, Olivier, Yoan, DiPietro, Riccardo, Carey, Remington, Romanov, Igor, Jiao, Xuechen, Jellett, Cameron, Little, Mark, Marks, Adam, McNeill, Christopher R, McCulloch, Ian, McNellis, Erik R, Andrienko, Denis, Beljonne, David, Sinova, Jairo, Sirringhaus, Henning |
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| Přispěvatelé: | Schott, Sam [0000-0001-7387-3644], Apollo - University of Cambridge Repository |
| Rok vydání: | 2019 |
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| Popis: | 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. * ERC Synergy grant SC2 (no. 610115) * Alexander von Humboldt Foundation * Transregional Collaborative Research Center (SFB/TRR) 173 SPIN+X * Winton Programme for the Physics of Sustainability * Engineering and Physical Sciences Research Council (EPSRC) * Excellence Initiative by the Graduate School Materials Science in Mainz (GSC 266) * 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 * Tier-1 supercomputer of the Fédération Wallonie-Bruxelles, infrastructure funded by the Walloon Region under grant agreement n1117545 |
| Databáze: | OpenAIRE |
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