Tunable two-dimensional interfacial coupling in molecular heterostructures
Permanent link to this recordhttp://hdl.handle.net/20.500.12613/27
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AbstractTwo-dimensional van der Waals heterostructures are of considerable interest for the next generation nanoelectronics because of their unique interlayer coupling and optoelectronic properties. Here, we report a modified Langmuir–Blodgett method to organize two-dimensional molecular charge transfer crystals into arbitrarily and vertically stacked heterostructures, consisting of bis(ethylenedithio)tetrathiafulvalene (BEDT–TTF)/C60 and poly(3-dodecylthiophene-2,5-diyl) (P3DDT)/C60 nanosheets. A strong and anisotropic interfacial coupling between the charge transfer pairs is demonstrated. The van der Waals heterostructures exhibit pressure dependent sensitivity with a high piezoresistance coefficient of −4.4 × 10−6 Pa−1, and conductance and capacitance tunable by external stimuli (ferroelectric field and magnetic field). Density functional theory calculations confirm charge transfer between the n-orbitals of the S atoms in BEDT–TTF of the BEDT–TTF/C60 layer and the π* orbitals of C atoms in C60 of the P3DDT/C60 layer contribute to the inter-complex CT. The two-dimensional molecular van der Waals heterostructures with tunable optical–electronic–magnetic coupling properties are promising for flexible electronic applications.
CitationXu, B., Chakraborty, H., Yadav, V. K., Zhang, Z., Klein, M. L., Ren, S. (2017) Tunable two-dimensional interfacial coupling in molecular heterostructures. Nature Communications 8: 1-11. DOI: 10.1038/s41467-017-00390-1.
Citation to related workNature Publishing Group
Xu, Beibei (2017): Tunable two-dimensional interfacial coupling in molecular heterostructures. figshare. Dataset. https://doi.org/10.6084/m9.figshare.5005331.v1
Has partNature Communications, Vol. 8, Article number 312
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