Organic light emitting diode including organic layer comprising organic metal complex

摘要

Organic light emitting diodes (OLEds) are provided. In one embodiment, an OLED includes a first electrode, a second electrode and an organic layer positioned between the first and second electrodes. The organic layer comprises an organic metal complex represented by the formula [M(L)2]a, in which L is an anionic ligand, M is a metal that can be five-coordinated or six-coordinated with L, and a is an integer ranging from 2 to 4.

主权项

1. An organic light emitting diode comprising:
a first electrode; a second electrode; and an organic layer positioned between the first and second electrodes, wherein the organic layer comprises a host and a phosphorescent dopant, the host comprising an organic metal complex represented by Formula 1:
[M(L)2]a  Formula (1) wherein M is a metal that can be five-coordinated or six-coordinated with the Ls, a is an integer ranging from 2 to 4, and each L is an anionic ligand independently selected from the group consisting of ligands represented by Formulae 2 and 3: wherein each of A, B, C and D is independently selected from the group consisting of aromatic rings having from 5 to 20 ring members, and heteroaromatic rings having from 5 to 20 ring members, wherein each of X1, X2, X3 and X4 is independently selected from the group consisting of C, N, O, S or P, * is a site that binds M, A and B are bound to each other by a single bond, and C and D are bound to each other by a single bond.