# Common high-performance semiconducting polymers are not amorphous but semi-para-crystalline Source: [Common high-performance semiconducting polymers are not amorphous but semi-para-crystalline]() Collection index: [llms.txt]() Data updated: 2025-10-28T13:54:23.711Z Authors: Sara Marina, Edgar Gutierrez-Fernandez, Junkal Gutierrez, Marco Gobbi, Eduardo Solano, Jeromy Rech, Wei You, Luis Hueso, Agnieszka Tercjak, Harald Ade, Jaime Martin Published: 2021-03-29T14:26:54.000Z ## Abstract Precise determination of the solid-state microstructure of semiconducting polymers is of paramount importance for the further development of these materials in various organic electronic technologies. Yet, prior characterization of the ordering of semiconducting polymers often resulted in conundrums in which X-ray scattering and microscopy yielded seemingly contradicting results. Here, based on fast scanning calorimetry, we introduce for the first time the concept of the semi-para-crystallinity and measurement of the degree of para-crystallinity (ordered volume/mass fraction) in a set of materials that previously eluded understanding. In combination with lattice distortion determination within para-crystals (g-parameter from X-ray scattering) and nanomorphology, the complete solid-state microstructure is correlated with device properties. Our data show that the long-range charge carrier transport in these materials is more sensitive to the interconnection of para-crystal units than to the amount of structural order itself. ## Recorded benchmark results A research result applies to its stated dataset, split, metric and evaluation configuration. Compare like-for-like settings, preserve the metric's unit and direction, and distinguish paper-reported results from independent reproduction. The best result recorded here is not a claim of exhaustive, current global coverage. ## Original sources and implementation [Original paper]() [PDF]()