NOVEL ELECTRON TRANSPORT MATERIAL AND ORGANIC LUMINESCENCE DEVICE USING THE MATERIAL

摘要

PURPOSE: A novel electron transport material and an organic electroluminescence device using the material are provided, to improve the luminance efficiency and the lifetime of the device and to reduce the operation voltage. CONSTITUTION: The electron transport material is represented by the formula 1, 2, 3, 4 or 5, wherein R1 and R2 are independently H, an aliphatic hydrocarbon group of C1-C20, benzene, naphthalene, biphenyl, anthracene, aromatic polycyclic ring or a group derived from an aromatic ring, and both R1 and R2 cannot be H; Ar is benzene, naphthalene, biphenyl, anthracene, aromatic polycyclic ring or a group derived from an aromatic ring; R3 is H, an alkyl group or aliphatic hydrocarbon group of C1-C6, a substituted benzene, naphthalene, biphenyl, anthracene, aromatic polycyclic ring or an aromatic ring; X is NR4, S or O; and R4 is H, an alkyl group or aliphatic hydrocarbon group of C1-C7, benzene, naphthalene, biphenyl, anthracene, aromatic polycyclic ring or a group derived from an aromatic ring.