C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
C09K 11/06 (2006.01) H05B 33/14 (2006.01)
Patent
CA 2624927
This invention pertains to light emitting materials comprising novel ortho- metalated transition metal complexes [C~N]2ML, comprising chelate monoionic ligands (L), also called ancillary ligands. It has been surprisingly found that when the ancillary ligand comprises a substituted aromatic ring bearing a substituent possessing adequate electron-donating properties, said ligand (L) advantageously participates in the emission process, significantly shifting emission towards higher energies (blue-shift) and enabling appreciable improvement of the emission efficiency of complexes [C~N]2ML. Still objects of the invention are the use of said light emitting materials and organic light emitting device comprising said light emitting material.
La présente invention concerne de nouveaux matériaux électroluminescents comprenant des complexes à base de métaux de transition ortho-métalatés [C^N]2ML, comportant des ligands à ions uniques chélatés (L), également appelés des ligands auxiliaires. Chose étonnante, il s'est avéré que lorsque le ligand auxiliaire comprend un cycle aromatique substitué comportant un substituant possédant des propriétés donneuses d'électrons adéquates, ledit ligand (L) participe avantageusement au processus d'émission, déplaçant sensiblement les émissions vers des énergies supérieures (déplacement hypsochrome) et permettant d'obtenir des améliorations appréciables au niveau du rendement d'émission des complexes [C^N]2ML. L'invention concerne également l'utilisation desdits matériaux électroluminescents et des dispositifs électroluminescents organiques comprenant ce matériau électroluminescent.
Graetzel Michael
Hyun Myung Ho
Jin Sung Ho
Jung Ok-Sang
Kim Young In
Robic
Solvay (societe Anonyme)
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