Patent ID: 8097347

Claim:
A light-emitting electrochemical cell comprising at least two electrodes, and an electroluminescent material arranged between said electrodes, wherein said electroluminescent material comprises a charged metal complex having at least one metal atom, said metal atom being selected from the group consisting of Ir, Os, Pt, Re and Zn, with the proviso that said metal complex is different from [Ir(ppy) 2 (dtb-bpy)] + (PF 6 − ) and [Os(bpy) 2 (dppe)] 2+ (PF 6 − ) 2 , and wherein said charged metal complex comprises at least one chelating moiety selected from the group consisting of the compounds of the following formulas I, II and III: in which R 1 consists of one of F, CF 3 , branched or unbranched alkyl, alkyl ether, unsubstituted or substituted phenyl, fluorene, spirofluorene, sulfonate, or 4-sulfonatophenyl.