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US 8,409,729 B2Granted
Host materials for phosphorescent OLEDs
AssigneeUniversal Display Corporation
InventorsLichang Zeng, Alexey B. Dyatkin, Gregg Kottas, Chuanjun Xia, David Z. Li
Life of this patent
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Abstract
Novel aryl silicon and aryl germanium host materials are described. These compounds improve OLED device performance when used as hosts in the emissive layer of the OLED.
Claims18
A compound of Formula I comprising:
- wherein Ar and Ar′ are independently selected from the group consisting of phenyl, biphenyl, naphthyl, dibenzothiophene, and dibenzofuran, which are optionally further substituted;
- wherein Z is selected from Si and Ge;
- wherein L is a single bond or comprises aryl, amino, or combinations thereof;
- wherein L is optionally further substituted;
- wherein A is a group directly bonded to Z and is selected from the group consisting of dibenzofuran, dibenzothiophene, azadibenzofuran, azadibenzothiophene, dibenzoselenophene, azadibenzoselenophene, and combinations thereof, which are optionally further substituted with at least one group selected from the group consisting of hydrogen, deuterium, halide, alkyl, cycloalkyl, heteroalkyl, arylalkyl, aryl, aryloxy, arylthio, arylseleno, pyridine, triazine, imidazole, benzimidazole, nitrile, isonitrile, and combinations thereof, and wherein the substitution is optionally fused to the group directly bonded to Z;
- and
- wherein B contains a group selected from the group consisting of carbazole, azacarbazole, and combinations thereof, which are optionally further substituted with at least one group 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 the substitution is optionally fused to the carbazole or azacarbazole group.
4 more elements
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, comprising a compound having the formula:
- wherein Ar and Ar′ are independently selected from the group consisting of phenyl, biphenyl, naphthyl, dibenzothiophene, and dibenzofuran, which are optionally further substituted;
- wherein Z is selected from Si and Ge;
- wherein L is a single bond or comprises aryl, amino, or combinations thereof;
- wherein L is optionally further substituted;
- wherein A is a group directly bonded to Z and is selected from the group consisting of dibenzofuran, dibenzothiophene, azadibenzofuran, azadibenzothiophene, dibenzoselenophene, azadibenzoselenophene, and combinations thereof, which are optionally further substituted with at least one group selected from the group consisting of hydrogen, deuterium, halide, alkyl, cycloalkyl, heteroalkyl, arylalkyl, aryl, aryloxy, arylthio, arylseleno, pyridine, triazine, imidazole, benzimidazole, nitrile, isonitrile, and combinations thereof, and wherein the substitution is optionally fused to the group directly bonded to Z;
- and
- wherein B contains a group selected from the group consisting of carbazole, azacarbazole, and combinations thereof, which are optionally further substituted with at least one group 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 the substitution is optionally fused to the carbazole or azacarbazole group.
8 more elements
Dependencies are inferred from the claim text.