Electroluminescent (2-phenylpyridine)iridium complexes and devices
A compound having the formula Ir(L A ) n (L B ) 3-n is disclosed wherein L A is an aza-DBF ligand and L B is an alkyl-substituted phenylpyridine ligand, wherein the compound has a structure according to Formula I: wherein A 1 , A 2 , A 3 , A 4 , A 5 , A 6 , A 7 , and A 8 comprise carbon or nitrogen; wherein at least one of A 1 , A 2 , A 3 , A 4 , A 5 , A 6 , A 7 , and A 8 is nitrogen; wherein ring B is bonded to ring A through a C—C bond; wherein the iridium is bonded to ring A through a Ir—C bond; wherein X is O, S, or Se; wherein R 1 and R 2 each independently represent mono-, di-, tri-, tetra-substitution, or no substitution; wherein R′ and R″ each independently represent mono-, di-substitution, or no substitution; wherein any adjacent substitutions in R′, R″, R 1 , R 2 , R 3 , R 4 , R 5 , and R 6 are optionally linked together to form a ring; wherein R 1 , R 2 , R′, and R″ 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 R 3 , R 4 , R 5 , and R 6 are each independently selected from the group consisting of hydrogen, deuterium, alkyl, cycloalkyl, and combinations thereof; wherein n is an integer from 1 to 3; and wherein total number of carbons in at least one of the pairs R 3 and R 4 , and R 5 and R 6 is at least four.
1. A compound having the formula Ir(L A ) n (L B ) 3-n ,
wherein the compound has a structure according to Formula V:
wherein X is O, S, or Se;
wherein R 1 represents mono-, di- substitution, or no substitution;
wherein R 2 represents mono-, di-, tri-, tetra-substitution, or no substitution;
wherein any adjacent substitutions in R, R 1 , R 2 , R 3 , R 4 , R 5 , and R 6 are optionally linked together to form a ring;
wherein R is selected from the group consisting of alkyl, cycloalkyl, its partially or fully deuterated variants thereof, and combinations thereof;
wherein R 1 and R 2 are each independently hydrogen or a substitution selected from the group consisting of 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, combinations thereof, and partially or fully deuterated variations of any of the foregoing;
wherein R 3 , R 4 , R 5 , and R 6 are each independently selected from the group consisting of hydrogen, deuterium, alkyl, cycloalkyl, and combinations thereof;
wherein n is an integer from 1 to 3; and
wherein the total number of carbons in at least one of the pairs R 3 and R 4 , and R 5 and R 6 is at least four.
2. The compound of claim 1 , wherein n is 1.
3. The compound of claim 1 , wherein X is O.
4. The compound of claim 1 , wherein R 1 and R 2 are each independently selected from the group consisting of hydrogen, deuterium, alkyl, cycloalkyl, and combinations thereof.
5. The compound of claim 1 , wherein at least one of the following conditions (1) and (2) is true:
(1) R 3 and R 4 are each independently selected from the group consisting of alkyl, cycloalkyl, partially or fully deuterated variants thereof, and combinations thereof; and total number carbons in R 3 and R 4 combined is at least four; and
(2) R 5 and R 6 are each independently selected from the group consisting of alkyl, cycloalkyl, partially or fully deuterated variants thereof, and combinations thereof; and total number of carbons in R 5 and R 6 combined is at least four.
6. The compound of claim 1 , wherein R 1 is selected from hydrogen or a substitution selected from the group consisting of alkyl, cycloalkyl, partially and fully deuterated variant thereof, and combinations thereof.
7. The compound of claim 1 , wherein L A is selected from the group consisting of:
8. the compound of claim 1 , wherein L B is selected from the group consisting of:
9. The compound of claim 1 , wherein the compound is selected from the group consisting of:
10. A formulation comprising a compound having a structure according to Formula V:
wherein X is O, S, or Se;
wherein R 1 represents mono-, di- substitution, or no substitution;
wherein R 2 represents mono-, di-, tri-, tetra-substitution, or no substitution;
wherein any adjacent substitutions in R, R 1 , R 2 , R 3 , R 4 , R 5 , and R 6 are optionally linked together to form a ring;
wherein R is selected from the group consisting of alkyl, cycloalkyl, its partially or fully deuterated variants thereof, and combinations thereof;
wherein R 1 and R 2 are each independently hydrogen or a substitution selected from the group consisting of halide, alkyl, cycloalkyl, heteroalkyl, arylalkyl, alkoxy, aryloxy, amino, sily, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carbonyl, carboxylic, acids, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, combinations thereof, and partially or fully deuterated variations of any of the foregoing;
wherein R 3 , R 4 , R 5 , and R 6 are each independently selected from the group consisting of hydrogen, deuterium, alkyl, cycloalkyl, and combinations thereof;
wherein n is an integer from 1 to 3; and
wherein the total number of carbons in at least one of the pairs R 3 and R 4 , and R 5 and R 6 is at least four.
11. A first device comprising a first organic light emitting device, the first organic light emitting device comprising:
an anode;
a cathode; and
an organic layer, disposed between the anode and the cathode, the organic layer comprising a compound having a structure according to Formula V:
wherein X is O, S, or Se;
wherein R 1 represents mono-, di- substitution, or no substitution;
wherein R 2 represents mono-, di-, tri-, tetra-substitution, or no substitution;
wherein any adjacent substitutions in R, R 1 , R 2 , R 3 , R 4 , R 5 , and R 6 are optionally linked together to form a ring;
wherein R is selected from the group consisting of alkyl, cycloalkyl, its partially or fully deuterated variants thereof, and combinations thereof;
wherein R 1 and R 2 are each independently hydrogen or a substitution selected from the group consisting of 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, combinations thereof, and partially or fully deuterated variations of any of the foregoing;
wherein R 3 , R 4 , R 5 , and R 6 are each independently selected from the group consisting of hydrogen, deuterium, alkyl, cycloalkyl, and combinations thereof;
wherein n is an integer from 1 to 3; and
wherein the total number of carbons in at least one of the pairs R 3 and R 4 , and R 5 and R 6 is at least four.
12. The first device of claim 11 , wherein the first device is selected from the group consisting of a consumer product, an electronic component module, an organic light-emitting device, and a lighting panel.
13. The first device of claim 11 , wherein the organic layer is an emissive layer and the compound is an emissive dopant or a non-emissive dopant.
14. The first device of claim 11 , wherein the organic layer further comprises a host, wherein the host comprises a triphenylene containing benzo-fused thiophene or benzo-fused furan;
wherein any substituent in the host is an unfused substituent independently selected from the group consisting of C n H 2n+1 , OC n H 2n+1 , OAr 1 , N(C n H 2n+1 ) 2 , N(Ar 1 )(Ar 2 ),CH═CH—C n H 2n+1 , C≡C—C n H 2n+1 , Ar 1 ,Ar 1 -Ar 2 , and C n H 2n− Ar 1 ;
wherein n is from 1 to 10; and
wherein Ar 1 and Ar 2 are independently selected from the group consisting of benzene, biphenyl, naphthalene, triphenylene, carbazole, and heteroaromatic analogs thereof.
15. The first device of claim 11 , wherein the organic layer further comprises a host, wherein the host comprises at least one chemical group selected from the group consisting of triphenylene, carbazole, dibenzothiophene, dibenzofuran, dibenzoselenophene, azatriphenylene, azacarbazole, aza-dibenzothiophene, aza-dibenzofuran, and aza-dibenzoselenophene.
16. The first device of claim 11 , wherein the organic layer further comprises a host, wherein the host is selected from the group consisting of:
and combinations thereof.