Conjugated polymers

摘要

The invention relates to novel conjugated polymers comprising in their backbone one or more divalent donor units, like for example benzo[1,2-b:4,5-b′]dithiophene-2,6-diyl (BDT), that are linked on both sides to an acceptor unit, to methods of preparing the polymers and educts or intermediates used in such preparation, to polymer blends, mixtures and formulations containing the polymers, to the use of the polymers, polymer blends, mixtures and formulations as semiconductors organic electronic (OE) devices, especially in organic photovoltaic (OPV) devices and organic photodetectors (OPD), and to OE, OPV and OPD devices comprising these polymers, polymer blends, mixtures or formulations.

主权项

1. A conjugated polymer that comprises in its backbone one or more electron donor units Di and one or more electron acceptor units Ai, and optionally one or two terminal or endcap units T, wherein each donor unit Di in the polymer backbone is flanked by two acceptor units Ai to form a triad Ai-Di-Ai, except for Di units adjacent to a terminal or endcap group T, which polymer fulfils the condition f≦s/2+2, wherein f is the total number of units Di in the polymer backbone, s is the total number of units Ai in the polymer backbone and s is at least 2, and excluding polymers comprising repeating units [A-D-A] wherein A is optionally substituted pyrazolone and D is optionally substituted benzo[1,2-b:4,5-b′]dithiophene.