MULTI-COMPONENT HOST MATERIAL AND ORGANIC ELECTROLUMINESCENT DEVICE COMPRISING THE SAME
The present invention relates to 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 dopant; the host consists of multi-component host compounds; at least a first host compound of the multi-component host compounds is a specific bicarbazole derivative containing an aryl group, and a second host compound is a specific carbazole derivative including a nitrogen-containing heteroaryl group. According to the present invention, an organic electroluminescent device using the multi-component host compounds has a high efficiency and long lifespan compared to the conventional organic electroluminescent device using one component of a host.
1 . An organic electroluminescent device comprising an anode, a cathode, and an organic layer between the anode and the cathode, wherein the organic layer comprises at least one light-emitting layer; at least one of the light-emitting layer comprises at least one dopant compound and two or more host compounds; a first host compound of the host compounds is represented by the following formula 1 and a second host compound of the host compounds is represented by the following formula 2:
Wherein
L 1 represents a single bond, or a substituted or unsubstituted (C6-C30)arylene group;
X 1 to X 16 each independently represent hydrogen, deuterium, a substituted or unsubstituted (C3-C30)cycloalkyl group, a substituted or unsubstituted (C6-C30)aryl group, a substituted or unsubstituted 3- to 30-membered heteroaryl group, a substituted or unsubstituted mono- or di-(C6-C30)arylamino group, a substituted or unsubstituted (C1-C30)alkyl(C6-C30)arylamino group, a substituted or unsubstituted tri(C1-C30)alkylsilyl group, a substituted or unsubstituted tri(C6-C30)arylsilyl group, a substituted or unsubstituted di(C1-C30)alkyl(C6-C30)arylsilyl group, or a substituted or unsubstituted (C1-C30)alkyldi(C6-C30)arylsilyl group; or are linked between adjacent substituents to form a substituted or unsubstituted mono- or polycyclic, (C3-C30) alicyclic or aromatic ring whose carbon atom(s) ring may be replaced with at least one hetero atom selected from nitrogen, oxygen, and sulfur;
A 1 represents a substituted or unsubstituted (C6-C30)aryl group;
La represents a single bond, or a substituted or unsubstituted (C6-C30)arylene group;
Ma represents a substituted or unsubstituted nitrogen-containing 5- to 18-membered heteroaryl group;
Xa to Xh each independently represent hydrogen, deuterium, a halogen, a cyano group, a substituted or unsubstituted (C1-C30)alkyl group, a substituted or unsubstituted (C2-C30)alkenyl group, a substituted or unsubstituted (C2-C30)alkynyl group, a substituted or unsubstituted (C3-C30)cycloalkyl group, a substituted or unsubstituted (C6-C30)aryl group, a substituted or unsubstituted 3- to 30-membered heteroaryl group, a substituted or unsubstituted tri(C1-C30)alkylsilyl group, a substituted or unsubstituted tri(C6-C30)arylsilyl group, a substituted or unsubstituted di(C1-C30)alkyl(C6-C30)arylsilyl group, a substituted or unsubstituted (C1-C30)alkyldi(C6-C30)arylsilyl group, a substituted or unsubstituted (C1-C30)alkyl(C6-C30)arylamino group, or a substituted or unsubstituted mono- or di-(C6-C30)arylamino group; or are linked between adjacent substituents to form a substituted or unsubstituted mono- or polycyclic, (C3-C30) alicyclic or aromatic ring whose carbon atom(s) ring may be replaced with at least one hetero atom selected from nitrogen, oxygen and sulfur; and
the heteroaryl group contains at least one hetero atom selected from B, N, O, S, P(═O), Si and P.
2 . The organic electroluminescent device according to claim 1 , wherein the compound of formula 1 is represented by one selected from the following formulae 3-1 to 3-6:
wherein
X 1 to X 16 and A 1 are as defined in claim 1 .
3 . The organic electroluminescent device according to claim 1 , wherein L 1 , represents a single bond, or is represented by one selected from the following formulae 4-1 to 4-10:
Wherein
X 23 to X 84 each independently represent hydrogen, deuterium, a halogen, a cyano group, a substituted or unsubstituted (C1-C30)alkyl group, a substituted or unsubstituted (C2-C30)alkenyl group, a substituted or unsubstituted (C2-C30)alkynyl group, a substituted or unsubstituted (C3-C30)cycloalkyl group, a substituted or unsubstituted (C6-C30)aryl group, a substituted or unsubstituted 3- to 30-membered heteroaryl group, a substituted or unsubstituted tri(C1-C30)alkylsilyl group, a substituted or unsubstituted tri(C6-C30)arylsilyl group, a substituted or unsubstituted di(C1-C30)alkyl(C6-C30)arylsilyl group, a substituted or unsubstituted (C1-C30)alkyldi(C6-C30)arylsilyl group, a substituted or unsubstituted (C1-C30)alkyl(C6-C30)arylamino group, or a substituted or unsubstituted mono- or di-(C6-C30)arylamino group; or are linked between adjacent substituents to form a substituted or unsubstituted mono- or polycyclic, (C3-C30) alicyclic or aromatic ring whose carbon atom(s) ring may be replaced with at least one hetero atom selected from nitrogen, oxygen and sulfur.
4 . The organic electroluminescent device according to claim 1 , wherein A 1 of formula 1 represents a substituted or unsubstituted phenyl, a substituted or unsubstituted biphenyl, a substituted or unsubstituted terphenyl, a substituted or unsubstituted naphthyl, a substituted or unsubstituted fluorenyl, a substituted or unsubstituted phenanthrenyl, a substituted or unsubstituted anthracenyl, a substituted or unsubstituted indenyl, a substituted or unsubstituted triphenylenyl, a substituted or unsubstituted pyrenyl, a substituted or unsubstituted tetracenyl, a substituted or unsubstituted perylenyl, a substituted or unsubstituted chrysenyl, a substituted or unsubstituted naphthacenyl, or a substituted or unsubstituted fluoranthenyl.
5 . The organic electroluminescent device according to claim 1 , wherein Ma of formula 2 represents a substituted or unsubstituted nitrogen-containing 5- to 17-membered heteroaryl group.
6 . The organic electroluminescent device according to claim 5 , wherein Ma of formula 2 represents a monocyclic-based heteroaryl group selected from the group consisting of a substituted or unsubstituted pyrrolyl, a substituted or unsubstituted imidazolyl, a substituted or unsubstituted pyrazolyl, a substituted or unsubstituted triazinyl, a substituted or unsubstituted tetrazinyl, a substituted or unsubstituted triazolyl, a substituted or unsubstituted tetrazolyl, a substituted or unsubstituted pyridyl, a substituted or unsubstituted pyrazinyl, a substituted or unsubstituted pyrimidinyl, and a substituted or unsubstituted pyridazinyl, or a fused ring-based heteroaryl group selected from the group consisting of a substituted or unsubstituted benzoimidazolyl, a substituted or unsubstituted isoindolyl, a substituted or unsubstituted indolyl, a substituted or unsubstituted indazolyl, a substituted or unsubstituted benzothiadiazolyl, a substituted or unsubstituted quinolyl, a substituted or unsubstituted isoquinolyl, a substituted or unsubstituted cinnolinyl, a substituted or unsubstituted quinazolinyl, a substituted or unsubstituted naphthyridinyl, a substituted or unsubstituted quinoxalinyl, a substituted or unsubstituted carbazolyl, and a substituted or unsubstituted phenanthridinyl.
7 . The organic electroluminescent device according to claim 1 , wherein La in formula 2 represents a single bond, or is represented by one selected from the following formulae 5-1 to 5-10:
wherein
Xi to Xp each independently represent hydrogen, deuterium, a halogen, a cyano group, a substituted or unsubstituted (C1-C30)alkyl group, a substituted or unsubstituted (C2-C30)alkenyl group, a substituted or unsubstituted (C2-C30)alkynyl group, a substituted or unsubstituted (C3-C30)cycloalkyl group, a substituted or unsubstituted (C6-C30)aryl group, a substituted or unsubstituted 3- to 30-membered heteroaryl group, a substituted or unsubstituted tri(C1-C30)alkylsilyl group, a substituted or unsubstituted tri(C6-C30)arylsilyl group, a substituted or unsubstituted di(C1-C30)alkyl(C6-C30)arylsilyl group, a substituted or unsubstituted (C1-C30)alkyldi(C6-C30)arylsilyl group, a substituted or unsubstituted (C1-C30)alkyl(C6-C30)arylamino group, or a substituted or unsubstituted mono- or di-(C6-C30)arylamino group; or are linked between adjacent substituents to form a substituted or unsubstituted mono- or polycyclic, (C3-C30) alicyclic or aromatic ring whose carbon atom(s) ring may be replaced with at least one hetero atom selected from nitrogen, oxygen and sulfur.
8 . The organic electroluminescent device according to claim 1 , wherein the first host compound represented by formula 1 is selected from the group consisting of the following compounds:
9 . The organic electroluminescent device according to claim 1 , wherein the second host compound represented by formula 2 is selected from the group consisting of the following compounds:
10 . The organic electroluminescent device according to claim 1 , wherein the dopant compound is used as a phosphorescent dopant material.