Lamellarly Segregated Columnar Liquid Crystalline Alternating Copolymers with High Ambipolar Charge Mobilities

Segregated assembly in a π-conjugated donor-acceptor molecular system is imperative to create heterojunctions for optoelectronic applications. Here, we report lamellarly segregated columnar donor-acceptor arrays based on liquid crystalline alternating copolymers to afford high ambipolar and balanced charge mobilities. Especially, the rational molecular design renders the formation of a highly ordered hexagonal columnar superlattice based on the alternate lamellar structures. The ideal lamellar columnar heterojunction with regular distribution of donor-acceptor columns and remarkable intracolumnar order enables highly efficient and balanced hole and electron mobilities of 0.68 and 3.60 cm² V^-1 s^-1, respectively. This work demonstrates the unique self-organization process of alternating copolymers containing two electronically active constituents and provides new insights into the design of ambipolar semiconducting soft materials for electronic and photovoltaic applications.