Organic electroluminescent device
The present disclosure relates to an organic electroluminescent device. The organic electroluminescent device of the present disclosure can provide a low driving voltage and excellent luminous efficiency by comprising a specific combination of a host compound and a hole transport material.
1 . An organic electroluminescent device comprising: a first electrode; a second electrode opposing the first electrode; one or more light-emitting layers disposed between the first electrode and the second electrode; and a hole transport zone of one or more layers disposed between the first electrode and the light-emitting layer, wherein at least one layer of the hole transport zone comprises a compound selected from the group consisting of:
and at least one layer of the light-emitting layers comprises a compound represented by the following formula 2:
wherein
Ma represents a substituted or unsubstituted nitrogen-containing (3- to 30-membered)heteroaryl;
L 3 represents a substituted or unsubstituted (C6-C30)arylene;
formula 2 and formula 2-a are fused at the positions of e and f, f and g, or g and h of formula 2 and at the positions of * of formula 2-a to form a ring;
R 3 to R 5 each independently represent hydrogen, deuterium, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C6-C30)aryl(C1-C30)alkyl, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (C1-C30)alkyl(C6-C30)aryl, a substituted or unsubstituted (3- to 30-membered)heteroaryl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted tri(C1-C30)alkylsilyl, a substituted or unsubstituted di(C1-C30)alkyl(C6-C30)arylsilyl, a substituted or unsubstituted (C1-C30)alkyldi(C6-C30)arylsilyl, a substituted or unsubstituted tri(C6-C30)arylsilyl, a substituted or unsubstituted mono- or di-(C1-C30)alkylamino, a substituted or unsubstituted mono- or di-(C6-C30)arylamino, or a substituted or unsubstituted (C1-C30)alkyl(C6-C30)arylamino;
R represents hydrogen, deuterium, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C6-C30)aryl(C1-C30)alkyl, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (C1-C30)alkyl(C6-C30)aryl, a substituted or unsubstituted (3- to 30-membered)heteroaryl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted tri(C1-C30)alkylsilyl, a substituted or unsubstituted di(C1-C30)alkyl(C6-C30)arylsilyl, a substituted or unsubstituted (C1-C30)alkyldi(C6-C30)arylsilyl, a substituted or unsubstituted tri(C6-C30)arylsilyl, a substituted or unsubstituted mono- or di-(C1-C30)alkylamino, a substituted or unsubstituted mono- or di-(C6-C30)arylamino, or a substituted or unsubstituted (C1-C30)alkyl(C6-C30)arylamino;
o and q each independently represent an integer of 1 to 4, and p represents an integer of 1 to 2, where o, p, and q are an integer of 2 or more, each of R 3 to R 5 may be the same or different; and
the heteroaryl(ene) contains at least one hetero atom selected from B, N, O, S, Si, and P.
2 . The organic electroluminescent device according to claim 1 , wherein formula 2 is represented by any one of the following formulas 5 to 10:
wherein Ma, L 3 , R 3 to R 5 , R, o, p, and q are as defined in claim 1 .
3 . The organic electroluminescent device according to claim 1 , wherein in formula 2, Ma represents a substituted or unsubstituted pyridyl, a substituted or unsubstituted pyrimidinyl, a substituted or unsubstituted triazinyl, a substituted or unsubstituted quinazolinyl, or a substituted or unsubstituted quinoxalinyl.
4 . The organic electroluminescent device according to claim 1 , wherein in formula 2, R represents a substituted or unsubstituted (C6-C15)aryl, or a substituted or unsubstituted nitrogen-containing (5- to 15-membered)heteroaryl.
5 . The organic electroluminescent device according to claim 1 , wherein the compound represented by formula 2 is selected from the group consisting of:
6 . The organic electroluminescent device according to claim 1 , wherein the hole transport zone comprises a hole transport layer, and further comprises at least one layer of a hole injection layer, an electron blocking layer, and a hole auxiliary layer.