insulating materials may have the capability to form a self
organized bilayer in a single step through vertical phase separa
tion [5e10]. However, the actual tradeoff between transistor per
formance and other properties is still the main concern since such
hybrid matrixes usually restrain charge transport. A more capable
combination is to marry polymer (with high solution processabil
ity) with strongly interacting, pstacked small semiconducting
molecules (with high carrier mobility but poor solubility) [11e16].
To produce high performance solutionprocessed FETs, a variety
of nanostructures has further been considered as an elevating
enhancer of charge carrier transport in the active channel. Progress
with carbon nanotube and graphene for organicbased transistors
has been of signi cant interest because of their unique optoelec
tronic properties. Improvement in eld effect mobility was
observed in the hybrid (either blend or dual layer) carbon
nanotubepolythiophene FETs [17e23] and graphenepolymer FETs
[24e26] when compared to the pristine organic devices. The
feasibility of incorporating singlewalled carbon nanotube and
graphene/graphene oxide with poly(3,3000didodecylquaterthio
phene) polymer by inkjet printing technique has also been
explored [27,28]. The enhanced electrical characteristic is attrib
uted to the bene cial role of nanotube and graphene, which build
alternative paths for charge transport in the active channel. How
ever, those blended composites could also lead to a reduction in
ON/OFF current ratio (