Abstract: Disclosed herein is a red phosphorescent compound of the following Formula 1: wherein is R1 is a C1-C4 alkoxy group, R2, R3, R4 and R5 are independently selected from hydrogen, C1-C4 alkyl groups and C1-C4 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. Further disclosed herein is 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 one of the red phosphorescent compounds is used as a dopant of the light-emitting layer.

Abstract: Disclosed is an organic electroluminescent device comprising a structure having an anode, an emitting layer, and a cathode stacked therein, wherein a fluorescent compound represented by Formula 1 is used as a emitting material of the emitting layer or used as a dopant of the emitting layer: wherein A1 and A2 are independently selected from a substituted or unsubstituted C1-C6 aliphatic group, a C6-C20 aromatic group and a C5-C19 heterocyclic group containing N, S or O, A3 is selected from a substituted or unsubstituted C1-C6 aliphatic group, a C6-C20 aromatic group, a C5-C19 heterocyclic group containing N, S or O, and a hydrogen atom, and substituents of A1, A2 and A3 are respectively one or more and the substituent is selected from the group consisting of C1-C10 alkyl, C1-C1 alkoxy, C1-C10 alkylamino, C1-C10 alkylsilyl, a halogen atom, C6-C10 aryl, C6-C10 aryloxy, C6-C10 arylamino, C6-C10 arylsilyl and a hydrogen atom.