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 1 which is a bicarbazole derivative containing pyridine, and a second host compound is represented by the following formula 2 which is a carbazole derivative including a nitrogen-containing heteroaryl group: Wherein Ar 1 represents a substituted or unsubstituted (C6-C30)aryl group; L 1 and L 2 each independently represent a substituted or unsubstituted (C6-C18)arylene group, wherein the substituent(s) of the substituted arylene group of L 1 and L 2 is independently selected from the group consisting of hydrogen, deuterium, and an unsubstituted (C6-C60)aryl group; R 1 to R 16 and R 21 each independently represent hydrogen, deuterium, or a substituted or unsubstituted (C6-C60)aryl group; wherein the substituents of the substituted (C6-C60)aryl group of R 1 to R 16 and R 21 are selected from the group consisting of (C1-30)alkyl and (C6-C30)aryl; one of R 5 to R 8 is linked to one of R 9 to R 12 via a single bond; R 25 to R 32 each independently represent hydrogen, deuterium, 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-C60)aryl group, a substituted or unsubstituted 3- to 30-membered heteroaryl group, wherein the 3- to 30- membered heteroaryl is selected from the group consisting of dibenzofuranyl and dibenzothiophenyl, 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; Ar 2 represents a substituted or unsubstituted, nitrogen-containing 5- to 30-membered heteroaryl group; m represents 1; and the heteroaryl group of Ar 2 is selected from the group consisting of triazinyl, pyrimidinyl, pyridazinyl, benzoimidazolyl, quinolyl, isoquinolyl, quinazolinyl, quinoxalinyl, naphthyridinyl, and phenanthridinyl, which may be substituted with a (C6-C20)aryl group, a tri(C6-C12)arylsilyl group, a S- or O-containing 5- to 15-membered heteroaryl group, a (C6-C15)aryl group substituted with a (C1-C6)alkyl group, or a (C6-C15)aryl group substituted with a cyano group. Ar 1 represents a substituted or unsubstituted (C6-C30)aryl group; L 1 and L 2 each independently represent a substituted or unsubstituted (C6-C18)arylene group, wherein the substituent(s) of the substituted arylene group of L 1 and L 2 is independently selected from the group consisting of hydrogen, deuterium, and an unsubstituted (C6-C60)aryl group; R 1 to R 16 and R 21 each independently represent hydrogen, deuterium, or a substituted or unsubstituted (C6-C60)aryl group; wherein the substituents of the substituted (C6-C60)aryl group of R 1 to R 16 and R 21 are selected from the group consisting of (C1-30)alkyl and (C6-C30)aryl; one of R 5 to R 8 is linked to one of R 9 to R 12 via a single bond; R 25 to R 32 each independently represent hydrogen, deuterium, 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-C60)aryl group, a substituted or unsubstituted 3- to 30-membered heteroaryl group, wherein the 3- to 30- membered heteroaryl is selected from the group consisting of dibenzofuranyl and dibenzothiophenyl, 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; Ar 2 represents a substituted or unsubstituted, nitrogen-containing 5- to 30-membered heteroaryl group; m represents 1; and the heteroaryl group of Ar 2 is selected from the group consisting of triazinyl, pyrimidinyl, pyridazinyl, benzoimidazolyl, quinolyl, isoquinolyl, quinazolinyl, quinoxalinyl, naphthyridinyl, and phenanthridinyl, which may be substituted with a (C6-C20)aryl group, a tri(C6-C12)arylsilyl group, a S- or O-containing 5- to 15-membered heteroaryl group, a (C6-C15)aryl group substituted with a (C1-C6)alkyl group, or a (C6-C15)aryl group substituted with a cyano group.