Electroluminescent polymers used in display devices

摘要

The use of polymers contg. repeating units of formula (I) as electroluminescent materials is claimed: A<1>, A<3> = arylene or heteroarylene gps. with one or more rings, opt. bridged and/or condensed and opt. substd.; A<2> = monovalent aryl or heteroaryl gps. opt. modified as above. Also claimed are: (i) electroluminescent material contg. one or more polymers of formula (I); (ii) a process for the prodn. of such material by: (a) polycondensation of an organophosphorus cpd. of formula Z2P(O)-CH2A<3>-CH2P(O)Z2 (III) with a diketone of formula A<2>-CO-A<1>-CO-A<2> (II) in the presence of a base to give polymer (I); and (b) casting the polymer as a film on a substrate, and (iii) an electroluminescent system with one or more active layers, at least one of which contains polymer (I).