Efficient ambipolar transport properties in alternate stacking donor-acceptor complexes: from experiment to theory

Comprehensive investigations of crystal structures, electrical transport properties and theoretical simulations have been performed over a series of sulfur-bridged annulene-based donor-acceptor complexes with an alternate stacking motif. A remarkably high mobility, up to 1.57 cm 2 V −1 s −1 for hole...

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Veröffentlicht in:Physical chemistry chemical physics : PCCP 2016-05, Vol.18 (2), p.1494-1413
Hauptverfasser: Qin, Yunke, Cheng, Changli, Geng, Hua, Wang, Chao, Hu, Wenping, Xu, Wei, Shuai, Zhigang, Zhu, Daoben
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Sprache:eng
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Zusammenfassung:Comprehensive investigations of crystal structures, electrical transport properties and theoretical simulations have been performed over a series of sulfur-bridged annulene-based donor-acceptor complexes with an alternate stacking motif. A remarkably high mobility, up to 1.57 cm 2 V −1 s −1 for holes and 0.47 cm 2 V −1 s −1 for electrons, was obtained using organic single crystal field-effect transistor devices, demonstrating the efficient ambipolar transport properties. These ambipolar properties arise from the fact that the electronic couplings for both holes and electrons have the same super-exchange nature along the alternate stacking direction. The magnitude of super-exchange coupling depends not only on the intermolecular stacking distance and pattern, but also the energy level alignments between the adjacent donor-acceptor moieties. The concluded transport mechanism and structure-property relationship from this research will provide an important guideline for the future design of organic semiconductors based on donor-acceptor complexes. Comprehensive investigations of crystal structures, electrical transport properties and theoretical simulations have been performed over a series of donor-acceptor complexes.
ISSN:1463-9076
1463-9084
DOI:10.1039/c6cp01509c