Enhanced mobility in P3HT-based OTFTs upon blending with a phenylenethiophenethiophenephenylene small moleculeThis article is part of the ChemComm Emerging Investigators 2012 themed issue.Electronic supplementary information (ESI) available: Synthesis and NMR of dH-PTTP, AFM, electrical characterization, Ambient Ultraviolet Photoelectron Spectroscopy, GIWAXS and XRD experimental details. See DOI: 10.1039/c1cc15477j

An enhancement in charge transport capacity in a poly(3-hexylthiophene) (P3HT) semicrystalline film, up to field-effect mobilities approaching 0.1 cm 2 V 1 s 1 , has been achieved by co-deposition with a small molecule, i.e. 5,5-bis(4- n -hexylphenyl)-2,2-bithiophene (dH-PTTP), forming highly ordered crystals bridging large polymeric domains. A field-effect mobility up to 0.1 cm 2 V -1 s -1 has been achieved in P3HT films upon blending with dH-PTTP which forms crystals bridging large polymeric domains.