Xiao, M and Carey, RL and Chen, H and Jiao, X and Lemaur, V and Schott, S and Nikolka, M and Jellett, C and Sadhanala, A and Rogers, S and Senanayak, SP and Onwubiko, A and Han, S and Zhang, Z and Abdi-Jalebi, M and Zhang, Y and Thomas, TH and Mahmoudi, N and Lai, L and Selezneva, E and Ren, X and Nguyen, M and Wang, Q and Jacobs, I and Yue, W and McNeill, CR and Liu, G and Beljonne, D and McCulloch, I and Sirringhaus, H (2021) Charge transport physics of a unique class of rigid-rod conjugated polymers with fused-ring conjugated units linked by double carbon-carbon bonds. In: Science Advances, 7 (18).
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Abstract
We investigate the charge transport physics of a previously unidentified class of electron-deficient conjugated polymers that do not contain any single bonds linking monomer units along the backbone but only double-bond linkages. Such polymers would be expected to behave as rigid rods, but little is known about their actual chain conformations and electronic structure. Here, we present a detailed study of the structural and charge transport properties of a family of four such polymers. By adopting a copolymer design, we achieve high electron mobilities up to 0.5 cm2 V−1 s−1. Field-induced electron spin resonance measurements of charge dynamics provide evidence for relatively slow hopping over, however, long distances. Our work provides important insights into the factors that limit charge transport in this unique class of polymers and allows us to identify molecular design strategies for achieving even higher levels of performance.
| Item Type: | Journal Article |
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| Publication: | Science Advances |
| Publisher: | American Association for the Advancement of Science |
| Additional Information: | The copyright for this article belongs to the author. |
| Keywords: | Carbon; Carrier transport; Electronic structure; Magnetic moments; Rigid structures; Spin fluctuations, Carbon-carbon bond; Chain conformations; Double-bond linkages; Electron spin resonance measurements; Electron-deficient; High electron mobility; Molecular design; Transport physics, Conjugated polymers |
| Department/Centre: | Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering |
| Date Deposited: | 17 Aug 2023 08:45 |
| Last Modified: | 17 Aug 2023 08:45 |
| URI: | https://eprints.iisc.ac.in/id/eprint/82800 |
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