Plurality of host materials and organic electroluminescent device comprising the same
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.
1. An organic electroluminescent compound represented by the following formula 3:
wherein,
Ar 21 and Ar 22 , 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);
L 21 represents a naphthylene unsubstituted or substituted with deuterium(s)
R 1 , R 4 , R 5 , and R 8 , 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
R 2 , R 3 , R 6 , and R 7 , each independently, represent hydrogen or deuterium;
with the proviso that if both Ar 21 and Ar 22 represent phenyl, at least one of R 1 , R 4 , R 5 , and R 8 is not hydrogen or deuterium.
2. The organic electroluminescent compound according to claim 1 , wherein the compound represented by formula 3 is at least one selected from the following compounds:
3. An organic electroluminescent device comprising the organic electroluminescent compound according to claim 1 .