title: Influence of Solid-State Packing of Dipolar Merocyanine Dyes on Transistor and Solar Cell Performances.
abstract: A series of nine dipolar merocyanine dyes has been studied as organic semiconductors in transistors and solar cells. These dyes exhibited single-crystal packing motifs with different dimensional ordering, which can be correlated to the performance of the studied devices. Hereby, the long-range ordering of the dyes in staircase-like slipped stacks with J-type excitonic coupling favors charge transport and improves solar cell performance. The different morphologies of transistor thin films and solar cell active layers were investigated by UV-vis, AFM, and XRD experiments. Selenium-containing donor-acceptor (D-A) dimethine dye 4 showed the highest hole mobility of 0.08 cm(2) V(-1) s(-1). BHJ solar cells based on dye 4 were optimized by taking advantage of the high crystallinity of the donor material and afforded a PCE of up to 6.2%.
authors.affiliation: Institut für Organische Chemie & Center for Nanosystems Chemistry, Universität Würzburg , Am Hubland, 97074 Würzburg, Germany.
authors.forename: Alhama
authors.initials: A
authors.lastname: Arjona-Esteban
authors.affiliation: Department Chemie, Universität zu Köln , Luxemburgerstr. 116, 50939 Köln, Germany.
authors.forename: Julian
authors.initials: J
authors.lastname: Krumrain
authors.affiliation: Institut für Organische Chemie & Center for Nanosystems Chemistry, Universität Würzburg , Am Hubland, 97074 Würzburg, Germany.
authors.forename: Andreas
authors.initials: A
authors.lastname: Liess
authors.affiliation: Institut für Organische Chemie & Center for Nanosystems Chemistry, Universität Würzburg , Am Hubland, 97074 Würzburg, Germany.
authors.forename: Matthias
authors.initials: M
authors.lastname: Stolte
authors.affiliation: Institut für Organische Chemie & Center for Nanosystems Chemistry, Universität Würzburg , Am Hubland, 97074 Würzburg, Germany.
authors.forename: Lizhen
authors.initials: L
authors.lastname: Huang
authors.affiliation: Institut für Organische Chemie & Center for Nanosystems Chemistry, Universität Würzburg , Am Hubland, 97074 Würzburg, Germany.
authors.forename: David
authors.initials: D
authors.lastname: Schmidt
authors.affiliation: Institut für Organische Chemie & Center for Nanosystems Chemistry, Universität Würzburg , Am Hubland, 97074 Würzburg, Germany.
authors.forename: Vladimir
authors.initials: V
authors.lastname: Stepanenko
authors.affiliation: Institut für Organische Chemie & Center for Nanosystems Chemistry, Universität Würzburg , Am Hubland, 97074 Würzburg, Germany.
authors.forename: Marcel
authors.initials: M
authors.lastname: Gsänger
authors.affiliation: Department Chemie, Universität zu Köln , Luxemburgerstr. 116, 50939 Köln, Germany.
authors.forename: Dirk
authors.initials: D
authors.lastname: Hertel
authors.affiliation: Department Chemie, Universität zu Köln , Luxemburgerstr. 116, 50939 Köln, Germany.
authors.forename: Klaus
authors.initials: K
authors.lastname: Meerholz
authors.affiliation: Institut für Organische Chemie & Center for Nanosystems Chemistry, Universität Würzburg , Am Hubland, 97074 Würzburg, Germany.
authors.forename: Frank
authors.initials: F
authors.lastname: Würthner