Organic electroluminescence element, and material for organic electroluminescence element
AssigneeIdemitsu Kosan Co., Ltd.
InventorsKazuki Nishimura, Toshinari Ogiwara, Kumiko Hibino, Tetsuya Inoue, Mitsunori Ito
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Abstract
The organic electroluminescence device includes an anode, a cathode, and at least an emitting layer between the anode and the cathode. The emitting layer includes a first host material, a second host material, and a phosphorescent dopant material. The first host material is a compound represented by a formula (1) below and the second host material is a compound represented by a formula (2) below.
Claims28
An organic electroluminescence device, comprising:
- an anode;
- a cathode;
- and
- at least an emitting layer between the anode and the cathode, the emitting layer comprising:
- a first host material;
- a second host material;
- and
- a phosphorescent dopant material,
- wherein
- the first host material is a compound represented by a formula (3):
- and
- the second host material is a compound represented by a formula (2):
- where:
- Z1 represents a cyclic structure fused at a of the formula (3) and is represented by a formula (1-1):
- Z2 represents a cyclic structure fused at b of the formula (3) and is represented by a formula (1-2);
- L1 represents a single bond;
- m is 1;
- n is 2;
- c, d, e, f are fused at a or b in the formula (3);
- R11 and R31 each represent a hydrogen atom;
- three X1 are nitrogen atoms;
- R1 each independently represent an unsubstituted phenyl group or an unsubstituted biphenyl group;
- a plurality of R1 are mutually the same or different;
- X3 is N—R32;
- R32 represents an unsubstituted phenyl group;
- R2 independently represents a hydrogen atom, a halogen atom, a cyano group, a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, a substituted or unsubstituted heterocyclic group having 5 to 30 ring atoms, a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 30 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 30 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 30 ring carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 30 carbon atoms, a substituted or unsubstituted aralkyl group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted aryloxy group having 6 to 30 ring carbon atoms;
- at least one of R2 at 2-position, 3-position, 4-position, 5-position, 6-position, and 7-position represents a substituted or unsubstituted 1-carbazolyl group, a substituted or unsubstituted 2-carbazolyl group, a substituted or unsubstituted 3-carbazolyl group, or a substituted or unsubstituted 4-carbazolyl group;
- R2 at 1-position and 8-position do not represent a substituted or unsubstituted carbazolyl group;
- p and q are 4;
- a plurality of R2 are mutually the same or different;
- adjacent groups of R2 are optionally bonded with each other to form a ring;
- L2 represents a single bond or a linking group, the linking group being one or a combination of a substituted or unsubstituted arylene group having 6 to 30 ring carbon atoms, a substituted or unsubstituted heterocyclic group having 5 to 30 ring atoms, and a cycloalkylene group having 5 to 30 ring carbon atoms;
- and
- FA represents a substituted or unsubstituted fused aromatic cyclic group having 10 to 30 ring carbon atoms.
A material for an organic electroluminescence device, comprising a compound represented by a formula (3) and a compound represented by a formula (2):
- where:
- Z1 represents a cyclic structure fused at a of the formula (3) and is represented by a formula (1-1):
- Z2 represents a cyclic structure fused at b of the formula (3) and is represented by a formula (1-2);
- L1 represents a single bond
- m is 1;
- n is 2;
- c, d, e, f are fused at a or b in the formula (3);
- R11 and R31 each represent a hydrogen atom;
- three X1 are nitrogen atoms;
- R1 each independently represent an unsubstituted phenyl group or an unsubstituted biphenyl group;
- a plurality of R1 are mutually the same or different;
- X3 is N—R32;
- R32 represents an unsubstituted phenyl group;
- R2 independently represents a hydrogen atom, a halogen atom, a cyano group, a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, a substituted or unsubstituted heterocyclic group having 5 to 30 ring atoms, a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 30 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 30 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 30 ring carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 30 carbon atoms, a substituted or unsubstituted aralkyl group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted aryloxy group having 6 to 30 ring carbon atoms;
- at least one of R2 at 2-position, 3-position, 4-position, 5-position, 6-position, and 7-position represents a substituted or unsubstituted 1-carbazolyl group, a substituted or unsubstituted 2-carbazolyl group, a substituted or unsubstituted 3-carbazolyl group, or a substituted or unsubstituted 4-carbazolyl group;
- R2 at 1-position and 8-position do not represent a substituted or unsubstituted carbazolyl group;
- p and q are 4;
- a plurality of R2 are mutually the same or different;
- L2 represents a single bond or a linking group, the linking group being one or a combination of a substituted or unsubstituted arylene group having 6 to 30 ring carbon atoms, a substituted or unsubstituted heterocyclic group having 5 to 30 ring atoms, and a cycloalkylene group having 5 to 30 ring carbon atoms;
- adjacent groups of R2 are optionally bonded with each other to form a ring;
- and
- FA represents a substituted or unsubstituted fused aromatic cyclic group having 10 to 30 ring carbon atoms.
Dependencies are inferred from the claim text.