Bicarbazole compounds for OLEDs
Novel organic compounds comprising a bicarbazole core are provided. In particular, the compounds has a 3,3′-bicarbazole core substituted at the 9-position with a triazine or pyrimidine. The compounds may be used in organic light emitting devices to provide devices having improved efficiency and improved lifetime.
1. A compound having the formula:
wherein R 1 and R 4 may represent mono, di, tri, or tetra substitutions;
wherein R 2 and R 3 may represent mono, di, or tri substitutions;
wherein R 1 , R 2 , R 3 , and R 4 are independently selected from the group consisting of hydrogen, alkyl, alkoxy, amino, alkenyl, alkynyl, aryl and heteroaryl;
wherein A 1 and Ar 2 are independently selected from aryl or heteroaryl;
wherein X is C or N; and
wherein at least one of the following it true:
(1) Ar 3 is independently selected from the group consisting of fluorene, dibenzofuran, dibenzothiophene, and triphenylene, and at least one of Ar 1 , Ar 2 , and Ar 3 is substituted with a substituent selected from the group consisting of alkyl, alkoxy, alkenyl, alkynyl, aryl and heteroaryl, wherein the substituent is not an aryl or heteroaryl fused directly to Ar 1 , Ar 2 , or Ar 3 ; and
(2) Ar 3 is selected from the group consisting of fluorene, dibenzofuran, and dibenzothiophene.
2. The compound of claim 1 , wherein at least one of Ar 1 , Ar 2 , and Ar 3 is substituted with a substituent selected from the group consisting of alkyl, alkoxy, alkenyl, alkynyl, aryl and heteroaryl, wherein the substituent is not an aryl or heteroaryl fused directly to A 1 , Ar 2 , or Ar 3 .
3. The compound of claim 1 , wherein A 1 and Ar 2 are independently selected from the group consisting of phenyl, pyridine, naphthalene, biphenyl, terphenyl, fluorene, dibenzofuran, dibenzothiophene, phenanthrene, and triphenylene; and
wherein at least one of A 1 , Ar 2 , and Ar 3 is further substituted with a substituent selected from the group consisting of alkyl, alkoxy, alkenyl, alkynyl, aryl and heteroaryl, wherein the substituent is not an aryl or heteroaryl fused directly to A 1 , Ar 2 , or Ar 3 .
4. The compound of claim 1 , wherein A 1 and Ar 2 are independently selected from the group consisting of phenyl, pyridine, and naphthalene.
5. The compound of claim 1 , wherein Ar 3 is selected from the group consisting of fluorene, dibenzofuran, and dibenzothiophene.
6. The compound of claim 1 , wherein R 1 , R 2 , R 3 , and R 4 are hydrogen.
7. A first device comprising an organic light emitting device, further comprising:
an anode;
a cathode; and
an organic layer, disposed between the anode and the cathode, wherein the organic layer comprises a compound having the formula:
wherein R 1 and R 4 may represent mono, di, tri, or tetra substitutions;
wherein R 2 and R 3 may represent mono, di, or tri substitutions;
wherein R 1 , R 2 , R 3 , and R 4 are independently selected from the group consisting of hydrogen, alkyl, alkoxy, amino, alkenyl, alkynyl, aryl and heteroaryl;
wherein Ar 1 and Ar 2 are independently selected from aryl or heteroaryl;
wherein X is C or N; and
wherein at least one of the following it true:
(1) Ar 3 is independently selected from the group consisting of fluorene, dibenzofuran, dibenzothiophene, and triphenylene, and at least one of Ar 1 , Ar 2 , and Ar 3 is substituted with a substituent selected from the group consisting of alkyl, alkoxy, alkenyl, alkynyl, aryl and heteroaryl, wherein the substituent is not an aryl or heteroaryl fused directly to Ar 1 , Ar 2 , or Ar 3 ; and
(2) Ar 3 is selected from the group consisting of fluorene, dibenzofuran, and dibenzothiophene.
8. The device of claim 7 , wherein at least one of Ar 1 , Ar 2 , and Ar 3 is substituted with a substituent selected from the group consisting of alkyl, alkoxy, alkenyl, alkynyl, aryl and heteroaryl, wherein the substituent is not an aryl or heteroaryl fused directly to A 1 , Ar 2 , or Ar 3 .
9. The device of claim 7 , wherein A 1 and Ar 2 are independently selected from the group consisting of phenyl, pyridine, naphthalene, biphenyl, terphenyl, fluorene, dibenzofuran, dibenzothiophene, phenanthrene, and triphenylene; and
wherein at least one of A 1 , Ar 2 , and Ar 3 is further substituted with a substituent selected from the group consisting of alkyl, alkoxy, alkenyl, alkynyl, aryl and heteroaryl, wherein the substituent is not an aryl or heteroaryl fused directly to A 1 , Ar 2 , or Ar 3 .
10. The device of claim 7 , wherein A 1 and Ar 2 are independently selected from the group consisting of phenyl, pyridine, and naphthalene.
11. The device of claim 7 , wherein Ar 3 is selected from the group consisting of fluorene, dibenzofuran, and dibenzothiophene.
12. The device of claim 7 , wherein R 1 , R 2 , R 3 , and R 4 are hydrogen.
13. The device of claim 7 , wherein the organic layer is deposited using solution processing.
14. The device of claim 7 , wherein the organic layer is an emissive layer and the compound having Formula I is a host.
15. The device of claim 14 , wherein the organic layer further comprises an emissive dopant having the structure:
16. The device of claim 7 , wherein the first device is a consumer product.
17. The device of claim 7 , wherein the first device is an organic light emitting device.
18. The compound of claim 1 , wherein the compound is selected from the group consisting of:
19. The device of claim 7 , wherein the compound is selected from the group consisting of:
20. The compound of claim 1 , wherein the compound is selected from the group consisting of: