1 research outputs found
Easily Processable Highly Ordered Langmuir-Blodgett Films of Quaterthiophene Disiloxane Dimer for Monolayer Organic Field-Effect Transistors
Self-assembly of highly soluble water-stable
tetramethyldisiloxane-based
dimer of α,α′-dialkylquaterthiophene on the water–air
interface was investigated by Langmuir, grazing incidence X-ray diffraction,
and X-ray reflectivity techniques. The conditions for formation of
very homogeneous crystalline monolayer Langmuir-Blodgett (LB) films
of the oligomer were found. Monolayer organic field-effect transistors
(OFETs) based on these LB films as a semiconducting layer showed hole
mobilities up to 3 × 10<sup>–3</sup> cm<sup>2</sup>/(V
s), on–off ratio of 10<sup>5</sup>, small hysteresis, and high
long-term stability. The electrical performance of the LB films studied
is close to that for the same material in the bulk or in the monolayer
OFETs prepared from water vapor sensitive chlorosilyl derivatives
of quaterthiophene by self-assembling from solution. These findings
show high potential of disiloxane-based LB films in monolayer OFETs
for large-area organic electronics