Fluoranthene imide dimers with strong isomeric effects on the charge transport properties
Journal
Physical Chemistry Chemical Physics
Journal Volume
26
Journal Issue
42
Start Page
26895
End Page
26899
ISSN
1463-9076
1463-9084
Date Issued
2024
Author(s)
DOI
10.1039/d4cp03245d
Abstract
To date, the development of high-performance n-type organic semiconductors has remained challenging due to the scarcity of highly electron-deficient π-conjugated structural units and the difficulty of controlling intermolecular packing in the thin-film state. In addition, there have been few reports on the use of dimer design to tune the optoelectronic properties of materials. Herein, we report new cyano-substituted fluoranthene imide-based dimers (F16 and F17) for small-molecule n-type organic semiconductors. It is noteworthy that substituents at different positions lead to different film morphologies and very distinct thermal aggregation behaviors due to different dihedral angles. The self-assembly behavior of F17 improves thermal stability. Therefore, F17, which has a closer cyano groups structure, exhibits better field-effect transistor performance, with a maximum mobility of 6.6 × 10−4 cm2 V−1 s−1, while F16 does not exhibit any transistor performance.
SDGs
Publisher
Royal Society of Chemistry (RSC)
Type
journal article