High Mobility n-Type Imide-Based Semiconductor with Unusual Single-Crystal Packing Structure in Solution-Processed Thin Film
Journal
Advanced Functional Materials
ISSN
1616-301X
1616-3028
Date Issued
2024-05-28
Author(s)
DOI
10.1002/adfm.202405171
Abstract
Solid-state molecular arrangement has been recognized as the most important role in the charge transport properties of organic semiconductors. Although highly ordered molecular stacking is achieved in single crystals, maintaining single-crystal molecular packing in solution-processed thin films remains a significant challenge. Herein, a new type of n-type organic semiconductors based on an asymmetric fluoranthene imide unit is reported, whose intermolecular packing and aggregation behavior in the thin film state can be effectively controlled by regulating the cyano substitution sites and alkyl chain types in the imide group. F10 with cyano groups at 4,9-sites and branched 2-ethylhexyl chain encouragingly shows a highly ordered single-crystal-like molecular packing in solution-processed thin film after thermal annealing, and thus the resulting organic field-effect transistors exhibit impressive charge transport performance, with the electron mobility as high as 0.116 cm2 V−1 s−1. This work opens a new avenue for developing high-performance solution-processed n-type semiconductors.
Subjects
fluoranthene imide
molecular packing
n-type organic semiconductors
organic field-effect transistors
Publisher
Wiley
Type
journal article