| abstract |
Diketopyrrolopyrrole (DPP) based polymers and copolymers comprising the following unitswherein x is chosen in the range of from 0.005 to 1, and y from 0.995 to 0, and wherein x+y=1, andwherein Ar1 and Ar2 independently from each other stand forblends of such polymers and copolymers with other polymers, their use for the preparation of electroluminescent ("EL") devices and EL devices comprising such polymers or copolymers. |