Organic electroluminescent device

An organic electroluminescent device comprising an anode, a cathode, and an organic layer between the anode and the cathode,

• wherein the organic layer comprises one or more light-emitting layers and one or more hole transport layers;
• at least one of the one or more light-emitting layers comprises one or more dopant compounds and two or more host compounds;
• a first host compound of the two or more host compounds is represented by the following formula 1;
• a second host compound is represented by the following formula 2;
• and at least one of the one or more hole transport layers comprises the compound represented by the following formula 3:
• wherein
• A1 and A2, each independently, represent a deuterium-substituted or unsubstituted (C6-C18)aryl;
• L1 represents a single bond or a substituted or unsubstituted (C6-C30)arylene;
• X1 to X16, each independently, represent hydrogen, deuterium, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C6-C60)aryl, a substituted or unsubstituted 3- to 30-membered heteroaryl containing at least one hetero atom selected from B, N, O, S, Si, and P, a substituted or unsubstituted tri(C1-C30)alkylsilyl, a substituted or unsubstituted tri(C6-C30)arylsilyl, a substituted or unsubstituted di(C1-C30)alkyl(C6-C30)arylsilyl, or a substituted or unsubstituted (C1-C30)alkyldi(C6-C30)arylsilyl;
• wherein
• Ma represents a substituted or unsubstituted nitrogen-containing 5- to 11-membered heteroaryl;
• La represents a substituted or unsubstituted (C6-C30)arylene;
• Xa to Xh, each independently, represent hydrogen, deuterium, a cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C2-C30)alkenyl, a substituted or unsubstituted (C2-C30)alkynyl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C6-C60)aryl, a substituted or unsubstituted 3- to 30-membered heteroaryl containing at least one heteroatom selected from O and S, a substituted or unsubstituted tri(C1-C30)alkylsilyl, a substituted or unsubstituted tri(C6-C30)arylsilyl, a substituted or unsubstituted di(C1-C30)alkyl(C6-C30)arylsilyl, a substituted or unsubstituted (C1-C30)alkyldi(C6-C30)arylsilyl, or a substituted or unsubstituted mono- or di-(C6-C30)arylamino;
• or may be linked to an adjacent substituent(s) to form a substituted or unsubstituted (C3-C30), mono- or polycyclic, alicyclic or aromatic ring, whose carbon atom(s) may be replaced with at least one hetero atom selected from nitrogen, oxygen, and sulfur, with the proviso that at least one of Xa to Xh is not hydrogen;
• wherein
• A4 and A5, each independently, represent a substituted or unsubstituted (C6-C30)aryl;
• L3 represents a single bond or a substituted or unsubstituted (C6-C30)arylene;
• Z1 to Z9, each independently, represent hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C2-C30)alkenyl, a substituted or unsubstituted (C2-C30)alkynyl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C6-C60)aryl, a substituted or unsubstituted 3- to 30-membered heteroaryl, a substituted or unsubstituted tri(C1-C30)alkylsilyl, a substituted or unsubstituted tri(C6-C30)arylsilyl, a substituted or unsubstituted di(C1-C30)alkyl(C6-C30)arylsilyl, a substituted or unsubstituted (C1-C30)alkyldi(C6-C30)arylsilyl, or a substituted or unsubstituted mono- or di-(C6-C30)arylamino;
• or may be linked to an adjacent substituent(s) to form a substituted or unsubstituted (C3-C30), mono- or polycyclic, alicyclic or aromatic ring, whose carbon atom(s) may be replaced with at least one hetero atom selected from nitrogen, oxygen, and sulfur;
• n represents an integer of 0 or 1, with proviso that when n represents 0, at least one of Z1 to Z9 is linked to an adjacent substituent(s) to form a substituted or unsubstituted (C3-C30), mono- or polycyclic, alicyclic or aromatic ring, whose carbon atom(s) may be replaced with at least one hetero atom selected from nitrogen, oxygen, and sulfur;
• t represents an integer of 0, 1, or 2;
• and
• the heteroaryl contains at least one hetero atom selected from B, N, O, S, Si, and P.