Doping of large ionization potential indenopyrazine polymers via Lewis acid complexation with tris(pentafluorophenyl)borane: a simple method for improving the performance of organic thin-film transistors - Han, Y; Barnes, G; Lin, Y-H; Martin, J; Al-Hashimi, M; AlQaradawi, SY; Anthopoulos, TD; Heeney, M (Chemistry of Materials, 2016)