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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 35: Focus: Polymer Crystallization - from Model Systems to New Materials I

CPP 35.2: Vortrag

Mittwoch, 22. März 2017, 10:30–10:45, ZEU 222

Controlled Crystallization of n-type Semiconducting Polymer Thin Films — •Sabine Ludwigs — Institute of Polymer Chemistry, University of Stuttgart

This contribution will focus on current activities in my group on thin films of n-type semiconducting poly[N,N*-bis(2-octyldodecyl)-1,4,5,8-naphthalene-dicarboximide-2,6-diyl]-alt-5,5*-(2,2*-bithiophene) (PNDI2OD-T2) and its regioirregular analogues. The assignment of these donor-acceptor copolymers as conjugated redox polymers will be discussed based on electrochemical and field effect transistor measurements.(1,2) Solvent vapor annealing proves to be an excellent tool to obtain spherulitic structures with controlled nucleation density and crystalline order over large areas in thin films.(3) The role of post-annealing procedures to tailor textures and polymorphism will be further highlighted. (1) D. Trefz et al. J. Phys. Chem. C 2015, 119, 22760. (2) Y. Gross et al. Tuning aggregation by regioirregularity in n-type P(NDI2OD-T2) donor-acceptor copolymers, 2017, to be submitted. (3) G. Schulz, S. Ludwigs Adv.Funct.Mater. 2016 DOI: 10.1002/adfm.201603083.