Red phosphorescent compound and organic electroluminescent device using the same
Disclosed herein is a red phosphorescent compound of the following Formula 1: wherein is includes a phenyl part and a quinoline part, the quinoline part has one substituent selected from a C 1 -C 4 alkoxy group and the phenyl part has substituents independently selected from hydrogen, C 1 -C 4 alkyl groups and C 1 -C 4 alkoxy groups, and is selected from 2,4-pentanedione, 2,2,6,6-tetramethylheptane-3,5-dione, 1,3-propanedione, 1,3-butanedione, 3,5-heptanedione, 1,1,1-trifluoro-2,4-pentanedione, 1,1,1,5,5,5-hexafluoro-2,4-pentanedione, and 2,2-dimethyl-3,5-hexanedione.
1. A red phosphorescent compound of one of Formula 1 below:
2. An organic electroluminescent (EL) device comprising
an anode,
a hole injecting layer,
a hole transport layer,
a light-emitting layer,
an electron transport layer,
an electron injecting layer, and
a cathode laminated in this order
wherein the red phosphorescent compound according to claim 1 is used as a dopant of the light-emitting layer and is present in an amount of 0.5 to 20% by weight, based on the weight of a host.
3. The organic electroluminescent (EL) device according to claim 2 , wherein the host is selected from an Al complex, a Zn complex, and a carbazole derivative.
4. The organic electroluminescent (EL) device according to claim 3 , wherein the Al or Zn complex has at least one ligand selected from quinolyl, biphenyl, isoquinolyl, phenyl, naphthyl, methylquinolyl, dimethylquinolyl and dimethylisoquinolyl groups, and the carbazole derivative is 4,4′-N,N′ dicarbazole biphenyl (CBP).