期刊
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
卷 18, 期 20, 页码 14094-14103出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6cp01509c
关键词
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资金
- National Natural Science Foundation of China [21290191, 21372227, 21303213]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB12000000]
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.
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