Abstract
Mechanically flexible films of the highly crystalline core-cyanated perylenediimide (PDIF-CN2) molecular semiconductor are achieved via a novel grain boundary plasticization strategy in which a specially designed polymeric binder (PB) is used to connect crystallites at the grain boundaries. The new PB has a naphthalenediimide-dithiophene π-conjugated backbone end-functionalized with PDI units. In contrast to conventional polymer-small molecule blends where distinct phase separation occurs, this blend film with plasticized grain boundaries exhibits a morphology typical of homogeneous PDIF-CN2 films which is preserved upon bending at radii as small as 2 mm. Thin-film transistors fabricated with PB/PDIF-CN2 blends exhibit substantial electron mobilities even after repeated bending. This design represents a new approach to realizing flexible and textured semiconducting π-electron films with good mechanical and charge transport properties.
Original language | English (US) |
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Pages (from-to) | 5487-5492 |
Number of pages | 6 |
Journal | Journal of the American Chemical Society |
Volume | 142 |
Issue number | 12 |
DOIs | |
State | Published - Mar 25 2020 |
ASJC Scopus subject areas
- Catalysis
- Chemistry(all)
- Biochemistry
- Colloid and Surface Chemistry