Structural and charge-transport properties of a liquid-crystalline alpha,omega-disubstituted thiophene derivative: A joint experimental and theoretical study.
(2010) The Journal of Physical Chemistry. Part C — Vol. 114, n° 10, p. 4617-4627 (2010)
Files
Lemaur09.pdf
Restricted Access - Adobe PDF
- 3.46 MB
Details
- Authors
- Abstract
- We present a joint experimental and theoretical study of the structural and charge-transport properties of a liquid-crystalline alpha,omega-disubstituted oligothiophene derivative for application ill organic field-effect transistors. The structural properties of the crystalline and smectic phases are investigated by atomic force microscopy, X-ray reflectometry, and X-ray diffraction. To complement these data, molecular mechanics calculations together with the simulation of X-ray diffraction spectra were performed to determine the relative positions of the molecules in the unit cell. The electrical characteristics of field-effect transistors based oil the oligothiophene derivative were measured and compared in the crystalline and smectic phases. Although the silanation of the SiO2 gate dielectric promoted a marked improvement in the char-c-carrier mobilities in the crystalline Phase, the expected suppression of grain boundaries ill the liquid-crystalline phase was not unambiguously evidenced. The experimental results were further complemented by a detailed theoretical analysis of the electronic couplings governing the charge-transport properties oil the molecular scale.
- Affiliations
Citations
Lemaur, V., Bouzakraoui, S., Olivier, Y., Brocorens, P., Burhin, C., El Beghdadi, J., Martin-Hoyas, A., Jonas, A., Serban, D. A., Vlad, A., Boucher, N., Leroy, J., Sferrazza, M., Mouthuy, P.-O., Melinte, S., Sergeev, S., Geerts, Y., Lazzaroni, R., Cornil, J., & Nysten, B. (2010). Structural and charge-transport properties of a liquid-crystalline alpha,omega-disubstituted thiophene derivative: A joint experimental and theoretical study. The Journal of Physical Chemistry. Part C, 114(10), 4617-4627. https://doi.org/10.1021/jp9070423 (Original work published 2010)