1 research outputs found
Electrospray-Processed Soluble Acenes toward the Realization of High-Performance Field-Effect Transistors
Functionalized acenes have proven
to be promising compounds in the field of molecular electronics because
of their unique features in terms of the stability, performance, and
ease of processing. The emerging concept of large-area-compatible
techniques for flexible electronics has brought about a wide variety
of well-established techniques for the deposition of soluble acenes,
with spray-coating representing an especially fruitful approach. In
the present study, electrostatic spray deposition is proposed as an
alternative to the conventional spray-coating processes, toward the
realization of high-performance organic field-effect transistors (OFETs),
on both rigid and flexible substrates. Particularly, a thorough study
on the effect of the solvent and spraying regime on the resulting
crystalline film’s morphology is performed. By optimization
of the process conditions in terms of control over the size as well
as the crystallization scheme of the droplets, desirable morphological
features along with high-quality crystal domains are obtained. The
fabricated OFETs exhibit excellent electrical characteristics, with
high field-effect mobility up to 0.78 cm<sup>2</sup>/(V s), <i>I</i><sub>on</sub>/<i>I</i><sub>off</sub> >10<sup>4</sup>, and near-zero threshold voltages. Additionally, the good
performance of the OFETs realized on plastic substrates gives great
potentiality to the proposed method for applications in the challenging
field of large-area electronics