Organic electroluminescent materials and devices
The present disclosure provides novel compounds based on azadibenzothiophenes, azadibenzofurans and azadibenzoselenophenes with at least two nitrogen atoms in the aza rings. The compounds can be used in green, red, yellow and white emitting devices as electron-transporting hosts.
1. A compound having a formula:
G 1 —L—G 2 , Formula I;
wherein G 1 has the structure:
and
G 2 has the structure:
wherein L is selected from the group consisting of a direct bond, an aryl group having from 6-30 carbon atoms, a heteroaryl group having from 3-30 carbon atoms, and combinations thereof; wherein the aryl group and the heteroaryl group are optionally further substituted with one or more groups 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;
wherein X is selected from the group consisting of O, S, and Se;
wherein each of X 1 , X 2 , X 3 , X 4 , X 5 , X 6 , X 7 , X 8 , Z 1 , Z 2 , Z 3 , Z 4 , Z 5 , Z 6 , Z 7 , and Z 8 is carbon or nitrogen;
wherein at least two of X 1 , X 2 , X 3 , X 4 , X 5 , X 6 , X 7 , and X 8 are nitrogen;
wherein at least one of X 1 , X 2 , X 3 , and X 4 is carbon and bonded to L;
wherein the dashed lines represent the bonds between G 1 and L and G 2 and L;
wherein each R 2 , R 3 , and R 4 represent mono, di, tri, tetra substitutions or no substitution;
wherein R 1 represents mono, di, tri substitutions or no substitution;
wherein R 1 , R 2 , R 3 , and R 4 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;
wherein the substitution is optionally fused to G 1 or G 2 ; and
wherein when R 3 or R 4 is carbazole or substituted carbazole, the carbazole or substituted carbazole is connected to G 2 by N.
2. The compound of claim 1 , wherein when R 1 or R 2 is carbazole or substituted carbazole, the carbazole or substituted carbazole is connected to G 1 by N.
3. The compound of claim 1 , wherein X is O or S.
4. The compound of claim 1 , wherein only two of X 1 , X 2 , X 3 , X 4 , X 5 , X 6 , X 7 , and X 8 are nitrogen.
5. The compound of claim 1 , wherein only two of X 1 , X 2 , X 3 , X 4 , X 5 , X 6 , X 7 , and X 8 are nitrogen and on the same ring.
6. The compound of claim 1 , wherein only two of X 1 , X 2 , X 3 , X 4 , X 5 , X 6 , X 7 , and X 8 are nitrogen and on the same ring that is bonded to L.
7. The compound of claim 1 , wherein each Z 1 , Z 2 , Z 3 , Z 4 , Z 5 , Z 6 , Z 7 , and Z 8 is carbon.
8. The compound of claim 1 , wherein R 1 , and R 2 are each independently selected from the group consisting of hydrogen, deuterium, halide, alkyl, phenyl, pyridyl, carbazolyl, and combinations thereof.
9. The compound of claim 1 , wherein R 3 , and R 4 are each independently selected from the group consisting of hydrogen, deuterium, phenyl, pyridyl, 9-carbazolyl, and combinations thereof.
10. The compound of claim 1 , wherein G 1 is selected from the group consisting of:
wherein X is selected from the group consisting of O, S, and Se.
11. The compound of claim 1 , wherein L is selected from the group consisting of:
a direct bond,
12. The compound of claim 1 , wherein G 1 is selected from the group consisting of:
13. The compound of claim 1 , wherein L is selected from the group consisting of:
a direct bond (L1),
14. The compound of claim 1 , wherein G 2 is selected from the group consisting of:
15. The compound of claim 1 , wherein the compound is Compound x having the formula Di-Lj-Ck;
wherein x=1740k+58j+i−1798, i is an integer from 1 to 58, j is an integer from 1 to 30, and k is an integer from 1 to 26; and
wherein D1 to D58 have the following structures:
wherein L1 to L30 have the following structures:
L1 is a direct bond,
and
wherein C1 to C26 have the following structures:
16. The compound of claim 1 , wherein the compound is selected from the group consisting of:
17. A first device comprising a first phosphorescent organic light-emitting device, the phosphorescent organic light-emitting device comprising:
an anode;
a cathode; and
an organic layer, disposed between the anode and the cathode, comprising a compound having a formula G 1 —L—G 2 , Formula I;
wherein G 1 has the structure:
and
G 2 has the structure:
wherein L is selected from the group consisting of a direct bond, an aryl group having from 6-30 carbon atoms, a heteroaryl group having from 3-30 carbon atoms, and combinations thereof; wherein the aryl group and the heteroaryl group are optionally further substituted with one or more groups 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;
wherein X is selected from the group consisting of O, S, and Se;
wherein each of X 1 , X 2 , X 3 , X 4 , X 5 , X 6 , X 7 , X 8 , Z 1 , Z 2 , Z 3 , Z 4 , Z 5 , Z 6 , Z 7 , and Z 8 is carbon or nitrogen;
wherein at least two of X 1 , X 2 , X 3 , X 4 , X 5 , X 6 , X 7 , and X 8 are nitrogen;
wherein at least one of X 1 , X 2 , X 3 , and X 4 is carbon and bonded to L;
wherein the dashed lines represent the bonds between G 1 and L and G 2 and L;
wherein each R 2 , R 3 , and R 4 represent mono, di, tri, tetra substitutions or no substitution;
wherein R 1 represents mono, di, tri substitutions or no substitution;
wherein R 1 , R 2 , R 3 , and R 4 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;
wherein the substitution is optionally fused to G 1 or G 2 ; and
wherein when R 3 or R 4 is carbazole or substituted carbazole, the carbazole or substituted carbazole is connected to G 2 by N.
18. The first device of claim 17 , wherein the organic layer is an emissive layer and the compound of Formula I is a host.
19. The first device of claim 17 , wherein the organic layer further comprising a phosphorescent emissive dopant.
20. The first device of claim 19 , wherein the phosphorescent emissive dopant is a transition metal complex having at least one ligand selected from the group consisting of:
wherein R a , R b , R c , and R d may represent mono, di, tri, or tetra substitution, or no substitution;
wherein R a , R b , R c , and R d are 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 two adjacent substituents of R a , R b , R c , and R d are optionally joined to form a fused ring or form a multidentate ligand.
21. A formulation comprising a compound having a formula G 1 —L—G 2 , Formula I;
wherein G 1 has the structure:
and
G 2 has the structure:
wherein L is selected from the group consisting of a direct bond, an aryl group having from 6-30 carbon atoms, a heteroaryl group having from 3-30 carbon atoms, and combinations thereof; wherein the aryl group and the heteroaryl group are optionally further substituted with one or more groups 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;
wherein X is selected from the group consisting of O, S, and Se;
wherein each of X 1 , X 2 , X 3 , X 4 , X 5 , X 6 , X 7 , X 8 , Z 1 , Z 2 , Z 3 , Z 4 , Z 5 , Z 6 , Z 7 , and Z 8 is carbon or nitrogen;
wherein at least two of X 1 , X 2 , X 3 , X 4 , X 5 , X 6 , X 7 , and X 8 are nitrogen;
wherein at least one of X 1 , X 2 , X 3 , and X 4 is carbon and bonded to L;
wherein the dashed lines represent the bonds between G 1 and L and G 2 and L;
wherein each R 2 , R 3 , and R 4 represent mono, di, tri, tetra substitutions or no substitution;
wherein R 1 represents mono, di, tri substitutions or no substitution;
wherein R 1 , R 2 , R 3 , and R 4 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;
wherein the substitution is optionally fused to G 1 or G 2 ; and
wherein when R 3 or R 4 is carbazole or substituted carbazole, the carbazole or substituted carbazole is connected to G 2 by N.