Cyclometalated transition metal complex and organic light emitting device using the same

An organic light emitting device, comprising:

• a pair of electrodes;
• and
• an organic layer interposed between the pair of electrodes, the organic layer comprising an emission layer comprising a red light emitting material comprised of a cyclometalated transition metal complex represented by Formula 1:
• where M is a transition metal;
• is a first mono anionic bidentate chelating ligand;
• is a second mono anionic bidentate chelating ligand;
• X and Y are each independently C, S, O, or N;
• CY1, CY2, and CY3 are each independently aromatic or aliphatic rings;
• and
• n is 1 or 2.

An organic light emitting device, comprising:

• a first electrode;
• a second electrode;
• and
• an organic layer interposed between the first electrode and the second electrode, the organic layer comprising an emission layer comprising a red light emitting material comprised of a cyclometalated transition metal complex represented by Formula 1:
• where M is a transition metal;
• is selected from the group consisting of ligands represented by formulae below:
• where Z is S, O, or NR8;
• and
• R1, R2, R3, R4, R5, R6, R7, and R8 are each independently hydrogen, halogen, carboxylic acid alkyl ester, CF3, CN, silyl, alkyl, aryl, alkoxy, aryloxy, amino, or arylene, where the aryl, the arylalkyl, and the aryloxy can be each independently substituted with halogen, CF3, CN, silyl, alkyl, aryl, alkoxy, aryloxy, amino, or arylene, and adjacent Rs may be fused together to form a five to seven membered aliphatic or aromatic ring;
• is selected from the group consisting of ligands represented by formulae below:
• where E is CR4, N, or P;
• q is an integer of 0 to 5;
• Z is O, S, or NR4;
• and
• R1 through R8 are each independently halogen, CF3, CN, silyl, alkyl, aryl, arylalkyl, alkoxy, aryloxy, amino, or arylene, wherein the aryl, the arylalkyl, and the aryloxy can be each independently substituted with halogen, CF3, CN, silyl, alkyl, aryl, alkoxy, aryloxy, amino, or arylene, and adjacent Rs may be fused together to form a five to seven membered aliphatic or aromatic ring;
• X and Y are each independently C, S, O, or N;
• and
• n is 1 or 2.