ELECTROLUMINISCENT METAL COMPLEXES CONTAINING A LIGAND THAT IS COORDINATED TO THE METAL VIA A PHOSPHOROUS ATOM

摘要

A light emitting device comprising : an anode; a cathode; a light emissive layer located between the anode and the cathode, said light emissive layer comprising a compound for emitting light, said compound comprising a metal complex and X, said metal complex containing a metal (M) and a phosphorous atom that is coordinated directly to M; and an aryl or heteroaryl group Ars that is directly bonded to the phosphorous atom; where Ars is substituted with X; and characterised in that X comprises an aryl or heteroaryl group.