Patent ID: 7915809

Claim:
An electrophosphorescent organic light-emitting diode (OLED), comprising: a substrate having a first opposing surface and a second opposing surface; a first electrode layer overlying the first opposing surface; and a light-emitting element overlying the first electrode layer, the light emitting element comprising a hole injection layer, a phosphorescent emissive layer and an electron transport layer, the hole injection layer comprising a crosslinked polysiloxane, the crosslinked polysiloxane comprising at least one siloxane unit R—Y—SiO 3/2 that comprises at least one aromatic amine group (R) and at least one divalent organic group (Y), the aromatic amine group comprising at least one of a carbazolyl group, a substituted carbazolyl group, a triarylamine group, and a substituted triarylamine group.