Reversibly reducible metal complexes as electron transporting materials for OLEDs
AssigneesUniversal Display Corporation, University of Southern California
InventorsRobert Walters, Raymond Kwong, Mark E. Thompson
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Abstract
The invention is reversibly reducible metal complexes and materials and an organic light emitting device, having an anode; a cathode; and at least one organic layer disposed between the anode and the cathode, made with the complexes of the invention. The reversibly reducible metal complexes are complexes a redox active metal center and at least one ligand; wherein; following a reduction of the complex, adding 1 extra electron to the complex, the extra electron is localized on the metal center. The complexes may function as an ETL or a host material.
Claims13
An organic light emitting device, comprising:
- an anode;
- a cathode;
- and at least one organic layer disposed between the anode and the cathode;
- the organic layer comprising a reversibly reducible metal complex of a redox active metal center and at least one ligand;
- wherein
- in a reduced state, an extra electron is localized on the metal center, and wherein the metal complex is of Formula I
- wherein M is a redox active transition metal, E1 and E3 are independently selected from nitrogen, oxygen, and sulfur mono-anionic donors;
- E2 is a C, N, P, or Si neutral donor;
- (X—Y) is selected from a photoactive ligand or an ancillary ligand;
- m is a value from 1 to the maximum number of ligands that may be attached to metal M;
- and m+n is the maximum number of ligands that may be attached to metal M, such that the overall complex is neutral.
Dependencies are inferred from the claim text.