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US 7,211,334 B2Granted
Electroluminescent materials and devices
AssigneeOled-T Limited
InventorsPoopathy Kathirgamanathan, Subramaniam Ganeshamurugan, Sivagnanasundram Surendrakumar
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Abstract
An electroluminescent material is a metal complex, preferably aluminium, of a substituted pyrazol-5-one.
Claims16
An electroluminescent device comprising:
- (i) a first electrode;
- (ii) a second electrode;
- and,
- (iii) a layer of an electroluminescent material positioned between said first and second electrodes, wherein said electroluminescent material comprises a compound having the following chemical formula:
- wherein, in Formula I,
- M is selected from the group consisting of lithium, sodium, potassium, rubidium, caesium, beryllium, magnesium, calcium, strontium, barium, copper, silver, gold, zinc, boron, aluminum, gallium, indium, germanium, tin, antimony, lead, manganese, iron, ruthenium, osmium, cobalt, rhodium, iridium, nickel, palladium, platinum, cadmium and chromium;
- n is the valency of M;
- and
- R1, R2 and R3 can be the same or different, each being independently selected from the group consisting of hydrogen;
- substituted or unsubstituted aliphatic groups;
- substituted or unsubstituted aromatic, heterocyclic or polycyclic ring structures;
- fluorocarbons;
- halogens and nitrile groups.
10 more elements
An electroluminescent device comprising:
- (i) a first electrode;
- (ii) a second electrode;
- and
- (iii) a layer of an electroluminescent material positioned between said first and second electrodes, wherein said electroluminescent material is a compound selected from the group of compounds as represented by the following chemical formulas (a) to (h):
1 more element
Dependencies are inferred from the claim text.