Suppression of dynamic disorder by electrostatic interactions in structurally close organic semiconductors
| Autor: | Dmitry Yu. Paraschuk, N.V. Tukachev, Oleg G. Kharlanov, Marina S. Polinskaya, Olga D. Parashchuk, Dmitry I. Dominskiy, Oleg V. Borshchev, Andrey Yu. Sosorev, Dmitry R. Maslennikov, Maxim S. Skorotetcky |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Intermolecular force General Physics and Astronomy Benzothiophene 02 engineering and technology Electron 010402 general chemistry 021001 nanoscience & nanotechnology Electrostatics 01 natural sciences Small molecule 0104 chemical sciences Crystal Organic semiconductor symbols.namesake chemistry.chemical_compound chemistry Chemical physics symbols Physical and Theoretical Chemistry 0210 nano-technology Raman spectroscopy |
| Zdroj: | Physical Chemistry Chemical Physics. 23:15485-15491 |
| ISSN: | 1463-9084 1463-9076 |
| DOI: | 10.1039/d1cp01599k |
| Popis: | Dynamic disorder manifested in fluctuations of charge transfer integrals considerably hinders charge transport in high-mobility organic semiconductors. Accordingly, strategies for suppression of the dynamic disorder are highly desirable. In this study, we suggest a novel promising strategy for suppression of dynamic disorder-tuning the molecular electrostatic potential. Specifically, we show that the intensities of the low-frequency (LF) Raman spectra for crystalline organic semiconductors consisting of π-isoelectronic small molecules (i.e. bearing the same number of π electrons)-benzothieno[3,2-b][1]benzothiophene (BTBT), chrysene, tetrathienoacene (TTA) and naphtho[1,2-b:5,6-b']dithiophene (NDT)-differ significantly, indicating significant differences in the dynamic disorder. This difference is explained by suppression of the dynamic disorder in chrysene and NDT because of stronger intermolecular electrostatic interactions. As a result, guidelines for the increase of the crystal rigidity for the rational design of high-mobility organic semiconductors are suggested. |
| Databáze: | OpenAIRE |
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