Organic light emitting material

A metal complex, which has a general structure of M(La)m(Lb)n(Lc)q, wherein La, Lb and Lc are the first ligand, the second ligand and the third ligand coordinated to the metal M, respectively;

• wherein the metal M is a metal whose atomic mass is greater than 40;
• wherein La, Lb and Lc may be optionally joined to form a multi-dentate ligand;
• wherein m is 1 or 2, n is 1 or 2, q is 0 or 1, and m+n+q equals to the oxidation state of the metal M;
• when m is greater than 1, La may be the same or different;
• and when n is greater than 1, Lb may be the same or different;
• wherein the first ligand La has a structure represented by Formula 1:
• wherein X1 to X4 are, at each occurrence identically or differently, selected from CR1 or N;
• wherein Y1 to Y4 are, at each occurrence identically or differently, selected from CR2 or N;
• wherein R1 and R2 are, at each occurrence identically or differently, selected from the group consisting of:
• hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted arylalkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted aryl having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms, substituted or unsubstituted alkylsilyl having 3 to 20 carbon atoms, substituted or unsubstituted arylsilyl having 6 to 20 carbon atoms, substituted or unsubstituted amino having 0 to 20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a nitrile group, an isonitrile group, a sulfanyl group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof;
• in Formula 1, adjacent substituents can be optionally joined to form a ring;
• wherein the second ligand Lb has a structure represented by Formula 2:
• wherein Rt to Rz are, at each occurrence identically or differently, selected from the group consisting of:
• hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted arylalkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted aryl having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms, substituted or unsubstituted alkylsilyl having 3 to 20 carbon atoms, substituted or unsubstituted arylsilyl having 6 to 20 carbon atoms, substituted or unsubstituted amino having 0 to 20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a nitrile group, an isonitrile group, a sulfanyl group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof;
• in Formula 2, adjacent substituents can be optionally joined to form a ring;
• wherein the third ligand Lc is a monoanionic bidentate ligand.