| abstract |
Abstract of Disclosure n The invention relates to an electroluminescent device, in which the luminescent layer contains a luminescent compound and a compound of the general formula I as doping agent, wherein B is an unsaturated carbocyclic or heterocyclic 4-8-link ring, which can also contain an alicyclic bridge, the rings D and E are five- or six-link rings, which each can contain one more hetero-atom N, O and S, the radicals R are one or more substituents H or straight-chain or branched C 1 -C 6 -alkyl, X and Y are carbon or nitrogen, R 1 , R 2 and R 9 are H or straight-chain or branched C 1 -C 6 -alkyl, R 3 and R 8 are hydrogen, straight-chain or branched C 1 -C 6 -alkyl, hydroxy, -OR 16 , -COOR 16 , N,N-dialkylamino, acetylamino or halogen, wherein R 16 is hydrogen, or straight-chain or branched C 1 -C 6 -alkyl, R 1 and R 2 or R 2 and R 3 and/or R 8 and R 9 together can form an alicyclic, heterocyclic or aromatic ring, and A 1 and A 2 , which can be the same or different, are cyan, nitro or -COOR 16 . The compounds I are partly new. Together with the luminescent compound, the doping agents have a red or white color, depending on the concentration, with excellent quantum efficiency. |