Plurality of host materials and organic electroluminescent device comprising the same
AssigneeRohm and Haas Electronic Materials Korea Ltd.
InventorsSo-Young Jung, Su-Hyun Lee, Mi-Ja Lee, Doo-Hyeon Moon, Sang-Hee Cho
Life of this patent
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Abstract
The present disclosure relates to a plurality of host materials comprising a first host material comprising a compound represented by formula 1, and a second host material comprising a compound represented by formula 2, and an organic electroluminescent device comprising the same. By comprising a specific combination of compounds of the present disclosure as host materials, it is possible to provide an organic electroluminescent device having higher luminous efficiency and/or longer lifetime properties as compared with a conventional organic electroluminescent device.
Claims7
A plurality of host materials comprising a first host material comprising a compound represented by the following formula 1, and a second host material comprising a compound represented by the following formula 3:
- wherein,
- ring A, ring B, and ring C, each independently, represent a substituted or unsubstituted benzene ring, or a substituted or unsubstituted naphthalene ring;
- Y represents O, S, or NRa;
- Ra represents —L2—Ar2;
- Ar1 and Ar2, each independently, represent a substituted or unsubstituted (C6-C30)aryl;
- a substituted or unsubstituted (3- to 30-membered)heteroaryl containing at least one of nitrogen(s), oxygen(s), and sulfur(s);
- or a substituted or unsubstituted di(C6-C30)arylamino;
- L1 and L2, each independently, represent a single bond, a substituted or unsubstituted (C6-C30)arylene, or a substituted or unsubstituted (3- to 30-membered)heteroarylene;
- and
- n represents an integer of 0 or 1, with the proviso that if n is 0, both ring A and ring B are a substituted or unsubstituted naphthalene ring;
- wherein,
- Ar1 and Ar22, each independently, represent a phenyl unsubstituted or substituted with deuterium(s), a biphenyl unsubstituted or substituted with deuterium(s), a terphenyl unsubstituted or substituted with deuterium(s), or a naphthyl unsubstituted or substituted with deuterium(s);
- L21 represents a naphthylene unsubstituted or substituted with deuterium(s), or a biphenylene unsubstituted or substituted with deuterium(s);
- R1, R4, R5, and R8, each independently, represent hydrogen, deuterium, a phenyl unsubstituted or substituted with deuterium(s), a biphenyl unsubstituted or substituted with deuterium(s), a terphenyl unsubstituted or substituted with deuterium(s), or a naphthyl unsubstituted or substituted with deuterium(s);
- and
- R2, R3, R6, and R7, each independently, represent hydrogen or deuterium;
- with the proviso that if both Ar21 and Ar22 represent phenyl, at least one of R1, R4, R5, and R8 is not hydrogen or deuterium.
Dependencies are inferred from the claim text.