Light-emitting organometallic complexes
Novel organometallic compounds are provided, which include a 2-phenylpyridine iridium (Irppy) complex having alkyl and/or aryl substituted ligands and a heteroleptic or a homoleptic nature. These materials may be advantageously used in OLEDs to tune evaporation temperature and solubility, narrow emission, and increase device efficiency.
1. A heteroleptic iridium compound having the formula:
wherein n=1 or 2;
R 1 and R 4 are independently selected from the group consisting of hydrogen, alkyl, and aryl;
at least one of R 1 and R 4 is alkyl; and
R 2 , R 3 , and R 5 are hydrogen.
2. The compound of claim 1 , wherein the compound is selected from the group consisting of:
3. An organic light emitting device comprising:
an anode;
a cathode; and
an organic emissive layer, disposed between the anode and the cathode, the organic layer comprising a compound having the formula:
wherein n=1 or 2;
R 1 and R 4 are independently selected from the group consisting of hydrogen, alkyl, and aryl;
at least one of R 1 and R 4 is alkyl; and
R 2 , R 3 , and R 5 are hydrogen.
4. The device of claim 3 , wherein the compound is selected from the group consisting of:
5. The device of claim 3 , wherein the organic emissive layer further comprises a host.
6. The device of claim 5 , wherein the host is a compound containing a carbazole group, triphenylene group or dibenzothiophene group.
7. The device of claim 3 , wherein the compound is:
8. The device of claim 7 , wherein the emissive organic layer contains a host and an emissive dopant, and Compound 11 is the emissive dopant.
9. The device of claim 7 , wherein Compound 11 is an emissive dopant and
is a host.
10. The device of claim 7 , wherein Compound 11 is an emissive dopant and
is a host.
11. The device of claim 3 , wherein the compound is:
12. The device of claim 11 , wherein the emissive organic layer contains a host and an emissive dopant, and Compound 35 is the emissive dopant.
13. The device of claim 11 , wherein Compound 35 is an emissive dopant and
is a host.
14. The device of claim 11 , wherein Compound 35 is an emissive dopant and
is a host.
15. An organic light emitting device comprising:
an anode;
a cathode; and
an organic emissive layer, disposed between the anode and the cathode, the organic layer comprising a compound having the formula:
wherein n=1 or 2;
R 1 , R 2 , R 5 and R 6 are independently selected from the group consisting of hydrogen, alkyl, and aryl;
at least one of R 2 and R 5 is alkyl;
R 4 is selected from the group consisting of hydrogen, alkyl and aryl, and may represent mono, di, or tri substitutions; and
R 3 and R 7 are hydrogen, wherein the organic emissive layer further comprises a host, wherein the host is
16. An organic light emitting device comprising:
an anode;
a cathode; and
an organic emissive layer, disposed between the anode and the cathode, the organic layer comprising a compound having the formula:
wherein n=1 or 2;
R 1 , R 2 , R 5 and R 6 are independently selected from the group consisting of hydrogen, alkyl, and aryl;
at least one of R 2 and R 5 is alkyl;
R 4 is selected from the group consisting of hydrogen, alkyl and aryl, and may represent mono, di, or tri substitutions; and
R 3 and R 7 are hydrogen, wherein the organic emissive layer further comprises a host, wherein the host is
17. An organic light emitting device comprising:
an anode;
a cathode; and
an organic emissive layer, disposed between the anode and the cathode, the organic layer comprising a compound having the formula:
wherein n=1 or 2;
R 1 and R 4 are independently selected from the group consisting of hydrogen, alkyl, and aryl;
at least one of R 1 and R 4 is alkyl;
R 3 is selected from the group consisting of hydrogen, alkyl and aryl, and may represent mono, di, or tri substitutions; and
R 2 and R 5 are hydrogen, wherein the organic emissive layer further comprises a host, wherein the host is