Organic electroluminescent materials and devices

1. A compound of Formula I:

wherein G 1 is selected from the group consisting of biphenyl, naphthalene, terphenyl, triphenylene, phenanthrene, anthracene, pyrene, chrysene, fluoranthene, dibenzofuran, dibenzothiophene, dibenzoselenophene, carbazole, indolocarbazole, indolodibenzofuran, indolodibenzothiophene, indolofluorene, pyridine, pyrimidine, phenylpyridine, quinolone, quinazoline, quinoxaline, benzoquinoline, phenanthridine, phenanthroline, acridine, azatriphenylene, azadibenzofuran, azadibenzothiophene, azadibenzoselenophene and azacarbazole;

wherein L is selected from the group consisting of a direct bond, alkyl, alkoxy, benzene, biphenyl, terphenyl, naphthalene, phenanthrene, pyrene, chrysene, pyridine, quinolone, quinazoline, fluorene, triphenylene, dibenzofuran, dibenzothiophene, carbazole, and combinations thereof;

wherein G 2 , G 3 and G 4 are each independently selected from the group consisting of phenyl, biphenyl, terphenyl, triphenylene, phenanthrene, anthracene, pyrene, chrysene, fluoranthene, dibenzofuran, dibenzothiophene, dibenzoselenophene, carbazole, indolocarbazole, indolodibenzofuran, indolodibenzothiophene, indolofluorene, pyridine, pyrimidine, phenylpyridine, quinolone, quinazoline, quinoxaline, benzoquinoline, phenanthridine, phenanthroline, acridine, azatriphenylene, azadibenzofuran, azadibenzothiophene, azadibenzoselenophene, azacarbazole, and combinations thereof;

wherein G 1 , G 2 , G 3 and G 4 each can be further substituted by one or more substituents selected from the group consisting of deuterium, halogen, alkyl, cycloalkyl, heteroalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carbonyl, carboxylic acid, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof; and

wherein G 1 -L can contain no more than one carbazole group, and is different from G 2 .

2. The compound of claim 1 , wherein G 2 , G 3 and G 4 are each independently selected from the group consisting of phenyl, and biphenyl.

3. The compound of claim 1 , wherein G 1 is an aryl group selected from the group consisting of biphenyl, naphthalene, terphenyl, triphenylene, phenanthrene, anthracene, pyrene, chrysene, fluoranthene and phenylpyridine; and

wherein the aryl group can be further substituted by one or more substituents selected from the group consisting of deuterium, halogen, alkyl, cycloalkyl, heteroalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carbonyl, carboxylic acid, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof.

4. The compound of claim 1 , wherein G 1 is a heteroaryl group selected from the group consisting of dibenzofuran, dibenzothiophene, dibenzoselenophene, carbazole, indolocarbazole, indolodibenzofuran, indolodibenzothiophene, indolofluorene, pyridine, pyrimidine, phenylpyridine, quinolone, quinazoline, quinoxaline, benzoquinoline, phenanthridine, phenanthroline, acridine, azatriphenylene, azadibenzofuran, azadibenzothiophene, azadibenzoselenophene, and azacarbazole; and

wherein the heteroaryl group can be further substituted by one or more substituents selected from the group consisting of deuterium, halogen, alkyl, cycloalkyl, heteroalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carbonyl, carboxylic acid, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof.

5. The compound of claim 1 , wherein the compound is selected from the group consisting of:

6. An organic light emitting device (OLED) comprising:

an anode;

a cathode; and

an organic layer, disposed between the anode and the cathode, comprising a compound of Formula I:

wherein G 1 is selected from the group consisting of biphenyl, naphthalene, terphenyl, triphenylene, phenanthrene, anthracene, pyrene, chrysene, fluoranthene, dibenzofuran, dibenzothiophene, dibenzoselenophene, carbazole, indolocarbazole, indolodibenzofuran, indolodibenzothiophene, indolofluorene, pyridine, pyrimidine, phenylpyridine, quinolone, quinazoline, quinoxaline, benzoquinoline, phenanthridine, phenanthroline, acridine, azatriphenylene, azadibenzofuran, azadibenzothiophene, azadibenzoselenophene and azacarbazole;

wherein L is selected from the group consisting of a direct bond, alkyl, alkoxyl, benzene, biphenyl, terphenyl, naphthalene, phenanthrene, pyrene, chrysene, pyridine, quinolone, quinazoline, fluorene, triphenylene, dibenzofuran, dibenzothiophene, carbazole, and combinations thereof;

wherein G 2 , G 3 and G 4 are each independently selected from the group consisting of phenyl, biphenyl, terphenyl, triphenylene, phenanthrene, anthracene, pyrene, chrysene, fluoranthene, dibenzofuran, dibenzothiophene, dibenzoselenophene, carbazole, indolocarbazole, indolodibenzofuran, indolodibenzothiophene, indolofluorene, pyridine, pyrimidine, phenylpyridine, quinolone, quinazoline, quinoxaline, benzoquinoline, phenanthridine, phenanthroline, acridine, azatriphenylene, azadibenzofuran, azadibenzothiophene, azadibenzoselenophene, azacarbazole, and combinations thereof;

wherein G 1 , G 2 , G 3 and G 4 each can be further substituted by one or more substituents selected from the group consisting of deuterium, halogen, alkyl, cycloalkyl, heteroalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carbonyl, carboxylic acid, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof; and

wherein G 1 -L can contain no more than one carbazole group, and is different from G 2 .

7. The OLED of claim 6 , wherein the organic layer is an emissive layer and the compound of Formula I is a host.

8. The OLED of claim 6 , wherein the organic layer further comprises a phosphorescent emissive dopant;

wherein the emissive dopant is a transition metal complex having at least one ligand or part of the ligand if the ligand is more than bidentate selected from the group consisting of:

wherein each X 1 to X 13 are independently selected from the group consisting of carbon and nitrogen;

wherein X is selected from the group consisting of BR′, NR′, PR′, O, S, Se, C═O, S═O, SO 2 , CR′R″, SiR′R″, and GeR′R″;

wherein R′ and R″ are optionally fused or joined to form a ring;

wherein each R a , R b , R c , and R d may represent from mono substitution to the possible maximum number of substitution, or no substitution;

wherein R′, R″, R a , R b , R c , and R d are each independently selected from the group consisting of hydrogen, deuterium, halide, alkyl, cycloalkyl, heteroalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carbonyl, carboxylic acids, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof; and

wherein any two adjacent substituents of R a , R b , R c , and R d are optionally fused or joined to form a ring or form a multidentate ligand.

9. The OLED of claim 6 , wherein the organic layer is a blocking layer and the compound of Formula I is a blocking material in the organic layer.

10. The OLED of claim 6 , wherein the organic layer is a transporting layer and the compound of Formula I is a transporting material in the organic layer.

11. The OLED of claim 6 , wherein the OLED is incorporated into a device selected from the group consisting of a consumer product, an electronic component module, and a lighting panel.

12. A formulation comprising a compound of Formula I:

wherein G 1 is selected from the group consisting of biphenyl, naphthalene, terphenyl, triphenylene, phenanthrene, anthracene, pyrene, chrysene, fluoranthene, dibenzofuran, dibenzothiophene, dibenzoselenophene, carbazole, indolocarbazole, indolodibenzofuran, indolodibenzothiophene, indolofluorene, pyridine, pyrimidine, phenylpyridine, quinolone, quinazoline, quinoxaline, benzoquinoline, phenanthridine, phenanthroline, acridine, azatriphenylene, azadibenzofuran, azadibenzothiophene, azadibenzoselenophene and azacarbazole;

wherein L is selected from the group consisting of a direct bond, alkyl, alkoxy, benzene, biphenyl, terphenyl, naphthalene, phenanthrene, pyrene, chrysene, pyridine, quinolone, quinazoline, fluorene, triphenylene, dibenzofuran, dibenzothiophene, carbazole, and combinations thereof;

wherein G 2 , G 3 and G 4 are each independently selected from the group consisting of phenyl, biphenyl, terphenyl, triphenylene, phenanthrene, anthracene, pyrene, chrysene, fluoranthene, dibenzofuran, dibenzothiophene, dibenzoselenophene, carbazole, indolocarbazole, indolodibenzofuran, indolodibenzothiophene, indolofluorene, pyridine, pyrimidine, phenylpyridine, quinolone, quinazoline, quinoxaline, benzoquinoline, phenanthridine, phenanthroline, acridine, azatriphenylene, azadibenzofuran, azadibenzothiophene, azadibenzoselenophene, azacarbazole, and combinations thereof;

wherein G 1 , G 2 , G 3 and G 4 each can be further substituted by one or more substituents selected from the group consisting of deuterium, halogen, alkyl, cycloalkyl, heteroalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carbonyl, carboxylic acid, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof; and

wherein G 1 -L can contain no more than one carbazole group, and is different from G 2 .