BENZIMIDAZOLO[1,2-A]BENZIMIDAZOLE CARRYING BENZIMIDAZOLO[1,2-A]BENZIMIDAZOLYL GROUPS, CARBAZOLYL GROUPS, BENZOFURANE GROUPS OR BENZOTHIOPHENE GROUPS FOR ORGANIC LIGHT EMITTING DIODES

摘要

Benzimidazolo[1,2-a]benzimidazole carrying benzimidazolo[1,2-a]benzimidazolylyl groups, carbazolyl groups, benzofurane groups or benzothiophene groups and their use in electronic devices, especially electroluminescent devices. When used as charge transport material, charge blocker material and/or host material in electroluminescent devices, the inventive compounds may provide improved efficiency, stability, manufacturability, or spectral characteristics of electroluminescent devices and reduced driving voltage of electroluminescent devices.