LIGHT-EMITTING COMPOUND AND ORGANIC LIGHT-EMITTING DEVICE USING THE SAME

An organic light emitting compound is provided to realize excellent thermal stability, oxidation stability, light emitting efficiency and electrical properties, thereby imparting high efficiency and improved lifespan to an organic light emitting device. An organic light emitting compound is represented by the following formula 1. In formula 1, Y is C or Si; X is a divalent linking group selected from a C6-C18 substituted or non-substituted arylene and C4-C10 substituted or non-substituted heteroarylene; R1 and R2 are the same or different, and each represents H, a C1-C8 substituted or non-substituted alkyl, C6-C30 substituted or non-substituted aryl, C4-C30 substituted or non-substituted heteroaryl or C10-C35 condensed multicyclic ring, with the proviso that R1 and R2 do not represent H at the same time; E is a C6-C35 substituted or non-substituted aryl, C6-C40 alkenylene-aryl or C10-C35 substituted or non-substituted condensed multicyclic aromatic group; and Z is an arylphosphine oxide or aryl benzimidazole group, wherein at least one of R1 and R2, or R1 and X are optionally linked to each other to form a fused ring.