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US 6,887,973 B2Granted
Electro-luminescent polymers, their preparation and uses
AssigneeCambridge Display Technology Limited
InventorsCarl Towns, Richard O'Dell, Valerie Grand
Life of this patent
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Abstract
An organic polymer comprising a conjugated backbone for transporting negative charge carriers and having a first band gap and at least one side unit pendent from the backbone for transporting positive charge carriers and having a second band gap, wherein the structure of the organic polymer is selected so that the first and second band gaps are distinct from one another in the polymer.
Claims24
An organic polymer comprising:
- a conjugated backbone for transporting negative charge carriers and having a first band gap;
- and
- at least one side unit pendant from the backbone for transporting positive charge carriers and having a second band gap,
- wherein the structure of the organic polymer is selected so that the first and second band gaps are distinct from one another in the polymer.
1 more element
An optical device comprising:
- a first charge carrier injecting layer for injecting positive charge carriers;
- a second charge carrier injecting layer for injecting negative charge carriers;
- a light emissive layer located between the charge carrier injecting layers and comprising an organic component for accepting and combining positive and negative charge carriers to generate light;
- a conjugated backbone for transporting negative charge carriers and having a first band gap;
- and
- at least one side unit pendant from the backbone for transporting positive charge carriers and having a second band gap,
- wherein the structure of the organic polymer is selected so that the first and second band gaps are distinct from one another in the polymer.
4 more elements
Dependencies are inferred from the claim text.