MULTI-COMPONENT HOST MATERIAL AND AN ORGANIC ELECTROLUMINESCENCE DEVICE COMPRISING THE SAME
The present invention relates to a multi-component host material and an organic electroluminescent device comprising the same. By comprising a specific combination of the multi-component host compounds, the organic electroluminescent device according to the present invention can provide high luminous efficiency and excellent lifespan characteristics.
1 . An organic electroluminescent device comprising at least one light-emitting layer between an anode and a cathode, wherein the light-emitting layer comprises a host and a phosphorescent dopant, the host consists of multi-component host compounds, at least a first host compound of the multi-component host compounds is represented by the following formula 3, and a second host compound is represented by the following formula 2:
wherein
A 1 and A 2 each independently represent a (C6-C18)aryl unsubstituted or substituted with deuterium;
L 1 is represented by the following formula 7;
Xi to Xl each independently represent hydrogen or deuterium;
X 1 to X 5 , X 7 to X 10 and X 12 to X 16 each independently represent hydrogen, deuterium, a (C6-C60)aryl unsubstituted or substituted with deuterium, or a (3- to 30-membered)heteroaryl unsubstituted or substituted with deuterium;
wherein
Ma represents a substituted or unsubstituted triazinyl;
La represents a single bond, or a (C6-C30)arylene unsubstituted or substituted with deuterium;
Xa to Xh each independently represent hydrogen, deuterium, a (C6-C60)aryl unsubstituted or substituted with deuterium, dibenzofuranyl unsubstituted or substituted with deuterium, or dibenzothiophenyl unsubstituted or substituted with deuterium; provided that at least one of Xa to Xh is dibenzofuranyl unsubstituted or substituted with deuterium, or dibenzothiophenyl unsubstituted or substituted with deuterium.
2 . The organic electroluminescent device according to claim 1 , wherein in formula 3,
A 1 and A 2 each independently are selected from the group consisting of phenyl, biphenyl, terphenyl and naphthyl.
3 . The organic electroluminescent device according to claim 1 , wherein in formula 2,
La is a single bond, or represented by one of the following formulae 7 to 19:
wherein
Xi to Xp each independently represent hydrogen or deuterium.
4 . The organic electroluminescent device according to claim 1 , wherein the compound represented by formula 3 is selected from the group consisting of:
5 . The organic electroluminescent device according to claim 1 , wherein the compound represented by formula 2 is selected from the group consisting of: