%0 Journal Article
%T Converging the Hole Mobility of Poly(2-N-carbazoylethyl acrylate) with Conjugated Polymers by Tuning Isotacticity
%J -
%D 2018
%R https://doi.org/10.1021/acsmacrolett.8b00595
%X Nonconjugated electroactive polymers (also known as pendant or side-chain electroactive polymers) promise several potential advantages relative to conjugated polymers including enhanced mechanical durability, greater stability and synthesis via living polymerization techniques. However, most previous examples suffer from low charge carrier mobility. Here, using poly(2-N-carbazoylethyl acrylate) (PCzEA) as a model polymer, we investigate the ability of side-chain tacticity to influence hole mobility. Specifically, we investigated polymers with dyad isotacticity (m) ranging from ‵45 to ‵95% synthesized by several methods including free radical polymerization and anionic polymerization. We found that the hole mobility (米h) measured via the space charge limited current (SCLC) technique increased proportionally to the increasing isotacticity from 2.11 ℅ 10每6 cm2 V每1 s每1 (m = 45.5%) to 4.68 ℅ 10每5 cm2 V每1 s每1 (m = 94.7%) in unannealed samples and that mobilities could be boosted as high as 2.74 ℅ 10每4 cm2 V每1 s每1 (m = 94.7%) with thermal annealing, which rivaled the well-known conjugated polymer poly(3-hexylthiophene) (P3HT) (米h = 5.8 ℅ 10每4 cm2 V每1 s每1). As such, we report here clear experimental evidence that control of side chain tacticity can enhance charge carrier mobility in nonconjugated pendant electroactive polymers, converging with mobilities typically only observed in conjugated polymers
%U https://pubs.acs.org/doi/10.1021/acsmacrolett.8b00595