Compounds for triplet-triplet annihilation upconversion
AssigneeUniversal Display Corporation
InventorChuanjun XIA
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Abstract
Novel compounds, and in particular, a dendritic system for improved triple-triplet annihilation upconversion (TTA-UC) are provided. The core of the dendrimer compound includes a metal complex, and on the peripheral, multiple acceptor moieties are covalently linked to the core through a spacer. Consequently, a high efficiency TTA-UC system in both solution and solid state is provided, with particularly high efficiency in the solid state. Additionally, organic light emitting devices (OLEDs) comprising a layer including these novel compounds are provided.
Claims28
A compound for triplet-triplet annihilation upconversion comprising:
- a metal complex sensitizer core;
- a first acceptor group;
- and
- a first spacer group between the metal complex core and the first acceptor group, wherein the first acceptor group has a first triplet energy lower than a first triplet energy of the metal complex sensitizer core.
A compound for triplet-triplet annihilation upconversion, wherein the compound has the following general structure:
- wherein A is a metal complex;
- wherein L1 to Lx is a spacer group;
- wherein B1 to Bx is an acceptor group B;
- wherein m1 is greater than 0;
- wherein mx is equal to or greater than 0,
- wherein n is greater than 0, and
- wherein the acceptor group B has a first triplet energy lower than a first triplet energy of the metal complex A.
A compound selected from the group consisting of:
Dependencies are inferred from the claim text.