Green phosphorescent iridium complexes, fabrication method thereof and organic light-emitting diodes comprising the same
A green phosphorescent iridium complex represented by Formula (I) is provided. In Formula (I), R1, R2 and R3 are, independently, hydrogen, halogen, substituted or non-substituted C1-6 alkyl, C1-6 alkoxy, cycloalkyl, substituted or non-substituted aryl, amino or heteroaryl, and L is a heterocyclic ring containing N—N or N—O ligand. The invention also provides a method for fabricating the green phosphorescent iridium complex and an organic light-emitting diode including the green phosphorescent iridium complex.
1. A green phosphorescent iridium complex represented by Formula (I):
wherein
R1, R2 and R3 are, independently, hydrogen, halogen, substituted or non-substituted C1-6 alkyl, C1-6 alkoxy, cycloalkyl, substituted or non-substituted aryl, amino or heteroaryl; and
L is an N—N ligand represented by one of the following formulae
wherein R4-R7 are, independently, pyridine, quinoline, isoquinoline, pyrazine, pyrimidine, pyrrole, pyrazole, imidazole, indole, thiazole, isothiazole, oxazole, isoxazole, benzothiazole, benzoxazole, phenanthroline, methyl, ethyl, cyclohexyl, trifluoromethyl, benzyl, phenyl, naphthyl, diphenyl, anthryl, pyrenyl, phenanthryl, benzofuranyl or thiophenyl.
2. The green phosphorescent iridium complex as claimed in claim 1 , wherein R1, R2 and R3 are pyridine, quinoline, isoquinoline, pyrazine, pyrimidine, pyrrole, pyrazole, imidazole, indole, thiazole, isothiazole, oxazole, isoxazole, benzothiazole, benzoxazole or phenanthroline.
3. The green phosphorescent iridium complex as claimed in claim 1 , wherein R1, R2 and R3 are methyl, ethyl, cyclohexyl, trifluoromethyl, benzyl, phenyl, naphthyl, diphenyl, anthryl, pyrenyl, phenanthryl, benzofuranyl or thiophenyl.
4. An organic light-emitting diode, which comprises:
a cathode and an anode; and
an emitting layer which comprises a green phosphorescent iridium complex as claimed in claim 1 disposed between the cathode and the anode.
5. The organic light-emitting diode as claimed in claim 4 , wherein the organic light-emitting diode emits blue-green to yellow-green phosphorescence.
6. A green phosphorescent iridium complex represented by Formula (I):
wherein
R1, R2 and R3 are, independently, hydrogen, halogen, substituted or non-substituted C1-6 alkyl, C1-6 alkoxy, cycloalkyl, substituted or non-substituted aryl, amino or heteroaryl; and
L is an N—N ligand represented by one of the following formulae
wherein R4-R7 are, independently, hydrogen, halogen, substituted or non-substituted C1-6 alkyl, C1-6 alkoxy, cycloalkyl, substituted or non-substituted aryl, amino or heteroaryl.
7. The green phosphorescent iridium complex as claimed in claim 6 , wherein R1, R2 and R3 are pyridine, quinoline, isoquinoline, pyrazine, pyrimidine, pyrrole, pyrazole, imidazole, indole, thiazole, isothiazole, oxazole, isoxazole, benzothiazole, benzoxazole or phenanthroline.
8. The green phosphorescent iridium complex as claimed in claim 6 , wherein R1, R2 and R3 are methyl, ethyl, cyclohexyl, trifluoromethyl, benzyl, phenyl, naphthyl, diphenyl, anthryl, pyrenyl, phenanthryl, benzofuranyl or thiophenyl.
9. The green phosphorescent iridium complex as claimed in claim 6 , wherein R4-R7 are, independently, pyridine, quinoline, isoquinoline, pyrazine, pyrimidine, pyrrole, pyrazole, imidazole, indole, thiazole, isothiazole, oxazole, isoxazole, benzothiazole, benzoxazole or phenanthroline.
10. The green phosphorescent iridium complex as claimed in claim 6 , wherein R4-R7 are, independently, methyl, ethyl, cyclohexyl, trifluoromethyl, benzyl, phenyl, naphthyl, diphenyl, anthryl, pyrenyl, phenanthryl, benzofuranyl or thiophenyl.
11. An organic light-emitting diode, which comprises:
a cathode and an anode; and
an emitting layer which comprises a green phosphorescent iridium complex as claimed in claim 6 disposed between the cathode and the anode.
12. The organic light-emitting diode as claimed in claim 11 , wherein the organic light-emitting diode emits blue-green to yellow-green phosphorescence.