  Simultaneously optimizing performances, processability and fabrication cost
of organic electronic materials is the continual source of compromise hindering
the development of disruptive applications. In this work, we identified a
strategy to achieve record conductivity values of one of the most benchmarked
semiconducting polymers by doping with an entirely solution-processed,
water-free and cost-effective technique. High electrical conductivity for
poly(3-hexylthiophene) up to 21 S/cm has been achieved, using a commercially
available electron acceptor as both a Lewis acid and an oxidizing agent. While
we managed water-free solution-processing a three-time higher conductivity for
P3HT with a very affordable/available chemical, near-field microscopy reveals
the existence of concentration-dependent higher-conductivity micro-domains for
which furthermore process optimization might access to even higher
performances. In the perpetual quest of reaching higher performances for
organic electronics, this work shall greatly unlock applications maturation
requiring higher-scale processability and lower fabrication costs concomitant
of higher performances and new functionalities, in the current context where
understanding the doping mechanism of such class of materials remains of the
greatest interest.
