Semiconducting polymers (SCPs) are one of the main classes of organic electronics materials able to display both high charge carrier mobility (up to 20 cm 2 V -1 s -1 ) and excellent mechanical flexibility, putting them forward as a great candidate for flexible electronics. Moreover, the modular approach to their synthesis lends itself to a natural approach to molecular design, namely the selection of a sequence of conjugated fragments and sidechains in the repeat unit structure for a targeted application, e.g., organic photovoltaics, field effect transistors, light emitting diodes, and bioelectronics, based on their optical, electronic, thermal, and mechanical properties.