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US 6,097,147 AGranted
Structure for high efficiency electroluminescent device
AssigneeThe Trustees of Princeton University
InventorsMarc A Baldo, Diarmuid F. O'Brien, Stephen R. Forrest
Life of this patent
Estimating the term…
Abstract
A light emitting device including a pixel having a substantially transparent anode; a hole transporting layer over the anode; an emission layer over the hole transporting layer; a blocking layer over the emission layer; an electron transporting layer over the blocking layer; and a cathode in electrical contact with the electron transporting layer.
Claims20
A light emitting device including a pixel comprising:
- a substantially transparent anode;
- a hole transporting layer over said anode;
- an emission layer over said hole transporting layer;
- a blocking layer over said emission layer;
- an electron transporting layer over said blocking layer;
- and
- a cathode in electrical contact with said electron transporting layer.
4 more elements
A light emitting device including a pixel comprising:
- a transparent substrate;
- a substantially transparent anode over said substrate, said anode comprising indium tin oxide;
- a hole transporting layer over said anode, said hole transporting layer comprising NPD;
- an emission layer over said hole transporting layer, said emission layer comprising CBP and emitting light by phosphorescence;
- a blocking layer over said emission layer, said blocking layer BCP;
- an electron transporting layer over said blocking layer, said electron transporting layer comprising Alq.sub.3 ;
- and
- a cathode in electrical contact with said electron transporting layer.
5 more elements
A multicolor display device comprising a plurality of pixels, wherein at least one of said pixels comprises:
- a substantially transparent anode;
- a hole transporting layer over said anode;
- an emission layer over said hole transporting layer;
- a blocking layer over said emission layer;
- an electron transporting layer over said blocking layer;
- and
- a cathode in electrical contact with said electron transporting layer.
4 more elements
Dependencies are inferred from the claim text.