Naphthalenediimide Polymers with Finely Tuned In-Chain π-Conjugation: Electronic Structure, Film Microstructure, and Charge Transport Properties.

Erdmann, Tim; Fabiano, Simone; Milián-Medina, Begoña; Hanifi, David; Chen, Zhihua; Berggren, Magnus; Gierschner, Johannes; Salleo, Alberto et al. · Adv Mater · 2016

basic_science · Level V

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Abstract

Naphthalenediimide-based random copolymers (PNDI-TVTx) with different π-conjugated dithienylvinylene (TVT) versus π-nonconjugated dithienylethane (TET) unit ratios (x = 100→0%) are investigated. The PNDI-TVTx-transistor electron/hole mobilities are affected differently, a result rationalized by molecular orbital topologies and energies, with hole mobility vanishing but electron mobility decreasing only by ≈2.5 times when going from x = 100% to 40%.