Polaron spin dynamics in high-mobility polymeric semiconductors
Schott S, Chopra U, Lemaur V, Melnyk A, Olivier Y, Di Pietro R, Romanov I, Carey RL, Jiao X, Jellett C, Little M, Marks A, Mcneill CR, Mcculloch I, Mcnellis ER, Andrienko D, Beljonne D, Sinova J, Sirringhaus H (2019)
Publication Type: Journal article
Publication year: 2019
Journal
Book Volume: 15
Pages Range: 814-822
Journal Issue: 8
DOI: 10.1038/s41567-019-0538-0
Abstract
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.
Involved external institutions
Johannes Gutenberg-Universität Mainz (JGU)
Germany (DE)
University of Cambridge
United Kingdom (GB)
University of Mons / Université de Mons
Belgium (BE)
Monash University
Australia (AU)
Imperial College London / The Imperial College of Science, Technology and Medicine
United Kingdom (GB)
Max-Planck-Institut für Polymerforschung (MPI-P) / Max Planck Institute for Polymer Research
Germany (DE)
Germany (DE)
University of Cambridge
United Kingdom (GB)
University of Mons / Université de Mons
Belgium (BE)
Monash University
Australia (AU)
Imperial College London / The Imperial College of Science, Technology and Medicine
United Kingdom (GB)
Max-Planck-Institut für Polymerforschung (MPI-P) / Max Planck Institute for Polymer Research
Germany (DE)
How to cite
APA:
Schott, S., Chopra, U., Lemaur, V., Melnyk, A., Olivier, Y., Di Pietro, R.,... Sirringhaus, H. (2019). Polaron spin dynamics in high-mobility polymeric semiconductors. Nature Physics, 15(8), 814-822. https://doi.org/10.1038/s41567-019-0538-0
MLA:
Schott, Sam, et al. "Polaron spin dynamics in high-mobility polymeric semiconductors." Nature Physics 15.8 (2019): 814-822.
BibTeX: Download