Organometallic complex, light-emitting element, light-emitting device, electronic device, and lighting device
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorsTomoya Yamaguchi, Hideko Inoue, Tatsuyoshi Takahashi
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Abstract
A novel organometallic complex having high reliability is provided. The organometallic complex includes platinum and a ligand coordinated to the platinum. The ligand includes a plurality of pyridoindole skeletons. Each of the pyridoindole skeletons includes nitrogen bonded to the platinum. Each of the pyridoindole skeletons is bonded to an arylene group bonded to the platinum.
Claims16
An organometallic complex comprising:
- platinum;
- and
- a ligand coordinated to the platinum,
- wherein the ligand comprises a first pyridoindole skeleton and a second pyridoindole skeleton,
- wherein each of the first pyridoindole skeleton and the second pyridoindole skeleton comprises a first nitrogen bonded to the platinum and a second nitrogen,
- wherein the second nitrogen of the first pyridoindole skeleton is bonded to a carbon of the second pyridoindole skeleton, and
- wherein each of the first pyridoindole skeleton and the second pyridoindole skeleton is bonded to an arylene group bonded to the platinum.
An organometallic complex represented by a formula (G1),
- wherein in the formula (G1), Ar1 and Ar2 each independently represent a substituted or unsubstituted arylene group having 6 to 13 carbon atoms;
- and R1 to R12 each independently represent any of hydrogen, a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, a substituted or unsubstituted cycloalkyl group having 5 to 7 carbon atoms, and a substituted or unsubstituted aryl group having 6 to 13 carbon atoms.
An organometallic complex represented by a formula (G2),
- wherein in the formula (G2), R1 to R20 each independently represent any of hydrogen, a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, a substituted or unsubstituted cycloalkyl group having 5 to 7 carbon atoms, and a substituted or unsubstituted aryl group having 6 to 13 carbon atoms.
An organometallic complex represented by a formula (100) below
A light-emitting element comprising:
- an EL layer between a pair of electrodes,
- wherein the EL layer comprises a host material and a guest material,
- wherein the guest material is an organometallic complex including platinum and a ligand coordinated to the platinum,
- wherein the ligand comprise a plurality of pyridoindole skeletons,
- wherein each of the pyridoindole skeletons comprises nitrogen bonded to the platinum,
- wherein each of the pyridoindole skeletons is bonded to an arylene group bonded to the platinum, and
- wherein an energy difference between a lowest unoccupied molecular orbital level of the host material and a lowest unoccupied molecular orbital level of the guest material is within 0.4 eV.
A light-emitting element comprising:
- an EL layer between a pair of electrodes,
- wherein the EL layer comprises a host material and a guest material,
- wherein the guest material is an organometallic complex represented by a formula (G1),
- wherein an energy difference between a lowest unoccupied molecular orbital level of the host material and a lowest unoccupied molecular orbital level of the guest material is within 0.4 eV, and
- wherein in the formula (G1), Ar1 and Ar2 each independently represent a substituted or unsubstituted arylene group having 6 to 13 carbon atoms;
- and R1 to R12 each independently represent any of hydrogen, a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, a substituted or unsubstituted cycloalkyl group having 5 to 7 carbon atoms, and a substituted or unsubstituted aryl group having 6 to 13 carbon atoms.
Dependencies are inferred from the claim text.