LIGHT EMITTING MATERIAL AND ORGANIC LIGHT EMITTING ELEMENT USING SAME
申请人:Kyushu University,
National University Corporation
公开号:EP2949724A1
公开(公告)日:2015-12-02
An organic light emitting device containing a compound represented by the following general formula in a light emitting layer have a high light emission efficiency. In the general formula (1), R1 and R2 represent carbazolyl, aryl, heteroaryl, alkyl or cycloalkyl; R5 and R6 represent alkyl; R7, R8 and R9 represent aryl, alkyl or carbazolyl; R10 represents carbazolyl which may be substituted with carbazolyl, aryl, heteroaryl, alkyl or cycloalkyl; n1, n2, n6 and n7 represent an integer of from 0 to 4; n5 represents an integer of from 0 to 3; n8 and n9 represent an integer of from 0 to 5; and n10 represents 0 or 1.
A composition comprising a phosphorescent compound having an emission spectrum the maximum peak wavelength of which is between 380 nm or more and less than 495 nm, having no dendron and represented by the formula (1'), two or more phosphorescent compounds having an emission spectrum the maximum peak wavelength of which is between 495 nm or more and less than 750 nm and having a dendron, and a specific compound:
wherein M represents an iridium atom or the like, n1 represents an integer of 1 or more, n2 represents an integer of 0 or more, E1 and E2 represent a carbon atom or the like, the ring R1' represents a diazole ring, the ring R2 represents a 6-membered aromatic hydrocarbon ring or the like, and A1-G1-A2 represents an anionic bidentate ligand.
Provided is a light emitting device which is excellent in external quantum efficiency. The light emitting device comprises an anode, a cathode, a first light-emitting layer provided between the anode and the cathode, and a second light-emitting layer provided between the anode and the cathode. The first light-emitting layer is a layer obtained by using a polymer compound comprising a constitutional unit having a cross-linkable group and a phosphorescent constitutional unit, and the second light-emitting layer is a layer obtained by using a composition comprising a non-phosphorescent low molecular weight compound having a heterocyclic structure and at least two phosphorescent compounds.
Provided is a light emitting device excellent in luminance life.
A light emitting device comprising an anode, a cathode, a first organic layer disposed between the anode and the cathode (a layer comprising one or more phosphorescent compounds) and a second organic layer disposed between the anode and the first organic layer (a layer comprising one or more phosphorescent compounds and a crosslinked body of a crosslinkable material), wherein at least one phosphorescent compound contained in the first organic layer and at least one phosphorescent compound contained in the second organic layer are the same phosphorescent compound represented by the formula (1):
wherein M represents an iridium atom or the like, n1 represents an integer of 1 or more, n2 represents an integer of 0 or more, E1 and E2 represent a carbon atom or the like, the ring L1 represents an aromatic heterocyclic ring, the ring L2 represents an aromatic hydrocarbon ring or the like, A1-G1-A2 represents an anionic bidentate ligand, and at least one ring selected from among the ring L1 and the ring L2 has an aryl group, a monovalent heterocyclic group or a substituted amino group.
METAL COMPLEX AND LIGHT EMITTING ELEMENT USING SAME
申请人:Sumitomo Chemical Company, Limited
公开号:EP3168223A1
公开(公告)日:2017-05-17
Provided is a metal complex excellent in light emission stability.
A metal complex represented by the formula (1):
wherein M represents an iridium atom or the like, n1 represents an integer of 1 to 3, n2 represents an integer of 0 to 2, E2 to E4 represent a nitrogen atom or a carbon atom, two selected from among E2 to E4 are nitrogen atoms, the remaining one is a carbon atom, R1 represents an aryl group or the like, R2 and R3 represent a hydrogen atom, an alkyl group, an aryl group or the like, the ring B represents a triazole ring, the ring A represents an aromatic hydrocarbon ring or the like, and A1-G1-A2 represents an anionic bidentate ligand.