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Molecular structures of the polymers, (a) poly(vinyltriphenylamine) PvTPA, (b) poly(vinyldimethoxytriphenylamine) PvDMTPA, (c) poly(vinyldimethoxytriphenlydiamine) PvDMTPD, (d) schematic of a bottom gate bottom contact OFET architecture.
[(a)–(c)] The upper graphs show the output characteristics with to −60 V in steps of −10 V. [(d)–(f)]. The bottom graphs show the transfer characteristics of PvTPA, PvDMTPA, and PvDMTPD for . The black lines correspond to the as spun polymers and the gray lines to the annealed transistors. The dashed lines show the first derivative in units of the charge carrier mobility as calculated from the saturation region.
(a) Charge carrier mobility of PvDMTPA as a function of the molecular weight. Black squares show as spun transistors and the gray circles show the mobilities for annealed transistors. (b) Glass transition temperature of PvDMTPA as a function of the molecular weight. The gray curve shows an asymptotic fit according to Fox and Flory. The for shows a certain inconsistency due to a double peak in the curve (see supplementary information S2) Ref.23.
Material properties and OFET results for PvTPA, PvDMTPA, and PvDMTPD.
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