Heterocyclic compound and organic light emitting device comprising the same

1 2 3 4 1 32 3 Provided is a heterocyclic compound represented by Formula I: wherein Aris a linking group and a C6-C16 arylene or heteroarylene group; Arand Arare each independently a C6-C20 aryl group, a C4-C20 heteroaryl group or a C6-C20 fused polycyclic group; Aris a C6-C20 aryl group, a C6-C20 aryloxy group, a C4-C20 heteroaryl group or a C6-C20 fused polycyclic group; and Arand Ar, or Arand Armay be connected to each other to form a ring. The heterocyclic compound has high electrical stability and excellent charge transporting capability, and thus can be efficiently used as a material for forming at least one of a hole injecting layer, a hole transporting layer and an emitting layer suitable for fluorescent and phosphorescent devices realizing all colors including red, green, blue and white.