Liquid Crystal Ordering on Conjugated Polymers Film Morphology for High Performance

High-performance low-bandgap conjugated polymers bearing diethynylanthracene units for thin-film transistors.

Novel donor-acceptor π-conjugated copolymers, P(DPP-BDT) and P(DPP-ANT), were synthesized in 87-89% yield. Thin-film transistors (TFTs) made from the thermally annealed film of P(DPP-ANT) exhibited much better performance (e.g., μmax = 1.90 cm(2) V(-1) s(-1), Ion/off ≈ 10(6)) than those made from the thermally annealed film of P(DPP-BDT).

Mean-field theory for interchain orientational ordering of conjugated polymers.

We consider a generalized anisotropic planar-rotor model on a triangular lattice for interchain orientational ordering of undoped and doped polyacetylene, and investigate the effects of various terms on the symmetry and the range of stability of the observed herringbone (HB) phases. Dipole, quadrupole, and octopole interactions are included in the model with sixfold crystal-field anisotropy and...

Morphology and Charge Transport in Conjugated Polymers

Determining the relationship between charge transport and morphology is key to increasing the charge carrier mobility of conjugated polymers. This review details a fundamental study of the charge transport and morphology of regioregular poly(3-hexylthiophene) and sets out general principles for obtaining high charge carrier mobilities. The basis for this study was the finding that despite being...

Piezochromic fluorescence in liquid crystalline conjugated polymers.

Liquid crystalline diphenylacetylene polymer derivatives showed piezochromic fluorescence via order-to-disorder phase transition.

Morphology and ordering in thin liquid-crystal films on flat glass substrates.