title: Surface Grafting of Functionalized Poly(thiophene)s Using Thiol-Ene Click Chemistry for Thin Film Stabilization.
abstract: Regioregular poly[(3-hexylthiophene)-ran-(3-undecenylthiophene)] (pP3HT) and vinyl terminated poly(3-hexylthiophene) (xP3HT) were synthesized by the McCullough method and surface grafted to thiol modified silicon dioxide wafers using thiol-ene click chemistry. Utilizing this method, semiconducting, solvent impervious films were easily generated. Thiol-ene click chemistry is convenient for film stabilization in electronics because it does not produce side products that could be inimical to charge transport in the active layer. It was found through grazing incidence wide-angle X-ray scattering (GIWAXS) that there is no change in microstructure between as-spun films and thiol-ene grafted films, while there was a change after the thiol-ene grafted film was exposed to solvent. Organic field-effect transistors (oFETs) were fabricated from grafted films that had been swelled with chloroform, and these devices had mobilities on the order of 10-6cm2V-1s-1, which are consistent with poly(thiophene) monolayer devices.
authors: Conte Polymer Center for Polymer Research, University of Massachusetts-Amherst , 120 Governors Drive, Amherst, Massachusetts 01003, United States.
authors: K Lindsey
authors: KL
authors: Martin
authors: Conte Polymer Center for Polymer Research, University of Massachusetts-Amherst , 120 Governors Drive, Amherst, Massachusetts 01003, United States.
authors: Yannick
authors: Y
authors: Nyquist
authors: Conte Polymer Center for Polymer Research, University of Massachusetts-Amherst , 120 Governors Drive, Amherst, Massachusetts 01003, United States.
authors: Edmund K
authors: EK
authors: Burnett
authors: Conte Polymer Center for Polymer Research, University of Massachusetts-Amherst , 120 Governors Drive, Amherst, Massachusetts 01003, United States.
authors: Alejandro L
authors: AL
authors: Briseno
authors: Conte Polymer Center for Polymer Research, University of Massachusetts-Amherst , 120 Governors Drive, Amherst, Massachusetts 01003, United States.
authors: Kenneth R
authors: KR
authors: Carter
keywords: click-chemistry; conjugated polymers; microstructure; polythiophene; surface grafting