Patent ID: 8828560

Claim:
A light-emitting device comprising (i) an anode, (ii) a cathode and (iii) an emitter layer arranged between and in direct or indirect contact with the anode and the cathode, comprising at least one complex of the formula (I) (s-bph)ML (I) in which M represents Pt(II), Rh(I), Ir(I), Pd(II) or Au(III), L represents a bidentate ligand selected from phosphines, amines, arsines, and dienes, or L=X 2 , where each X, independently, represents a monodentate ligand, and s-bph represents the formula (II) wherein R 1 to R 8 each, independently of one another, represent H, alkyl, aryl, heteroaryl, alkenyl, alkynyl, halogen, —NR 2 , —PR 2 , —OR or —SR, wherein R is H, alkyl, aryl, heteroaryl, alkenyl or alkynyl, and wherein the radicals R 1 to R 8 are optionally linked to one another, and * represent the coordination sites of the ligand; and wherein the complex of the formula (I) forms an oligomer emitter.