Joshi, Gajadhar and Teferi, Mandefro Y. and Miller, Richards and Jamali, Shirin and Baird, Douglas and van Tol, Johan and Malissa, Hans and Lupton, John M. and Boehme, Christoph (2018) Isotropic Effective Spin-Orbit Coupling in a Conjugated Polymer. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 140 (22). pp. 6758-6762. ISSN 0002-7863,
Full text not available from this repository. (Request a copy)Abstract
Conjugated polymers are anisotropic in shape and with regard to electronic properties. Little is known as to how electronic anisotropy impacts the underlying characteristics of the electron spin, such as the coupling to orbital magnetic moments. Using multi-frequency electrically detected magnetic resonance spectroscopy extending over 12 octaves in frequency, we explore the effect of spin-orbit coupling by examining the pronounced broadening of resonance spectra with increasing magnetic field. Whereas in three commonly used materials, the high-field spectra show asymmetric broadening, as would be expected from anisotropic g-strain effects associated with the molecular structure, in the conducting polymer poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) the spectra broaden isotropically, providing a direct measure of the microscopic distribution in g-factors. This observation implies that effective charge-carrier g-tensors are isotropic, which likely originates from motional narrowing in this high-mobility material.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | DETECTED MAGNETIC-RESONANCE; LIGHT-EMITTING-DIODES; HIGH-FIELD; TRIPLET EMITTERS; THIN-FILMS; SPECTROSCOPY; EPR; DEVICES; POLY(3,4-ETHYLENEDIOXYTHIOPHENE); TRANSPORT; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Chair Professor Lupton > Group John Lupton |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 09 Mar 2020 10:19 |
| Last Modified: | 09 Mar 2020 10:19 |
| URI: | https://pred.uni-regensburg.de/id/eprint/14416 |
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