Journal Article n-type polymers organic electrochemical transistors organic field-effect transistors PBFDO THz spectroscopy Thermoelectric polymers anisotropic alignment catalyst aggregation charge trapping complementary circuits conducting polymers electron transport high‐temperature rubbing inverters microstructures molecular weight n-doping efficiency non-ideal behavior n‐type conductive polymers organic mixed ionic-electronic conductors organic mixed ionic‐electronic conductors polymer semiconductors pulsing stability scalable synthesis scanning Kelvin probe microscopy single‐ether side chains supramolecular chemistry thermoelectric properties