Heterocyclic compound and organic electroluminescent device comprising same

A heterocyclic compound, having a structure as shown in Formula I:

• wherein, in the structure as shown in Formula I, Ar1 is selected from a structure as shown in Formula II, and Ar2 and Ar3 are identical to each other or different from each other and independently selected from a structure as shown in Formula III;
• wherein L1 is independently selected from a single bond or any one of the following groups:
• wherein n1 is an integer selected from 1 to 4;
• L2 to L3 are identical to each other or different from each other and independently selected from any one of a single bond, substituted or unsubstituted C6 to C30 arylene or substituted or unsubstituted C3 to C30 heteroarylene;
• * is the attachment site between L1 and Ar1, the attachment site between L2 and Ar2 is any position on the structure as shown in Formula III, and the attachment site between L3 and Ar3 is any position on the structure as shown in Formula III;
• in the structure as shown in Formula II, R1 and R2 are identical to each other or different from each other and independently selected from any one of hydrogen, C1 to C12 alkyl, substituted or unsubstituted phenyl, or R1 and R2 are joined to form a substituted or unsubstituted ring, wherein substituted refers to mono- or multi-substitution with any of the following groups:
• deuterium, methyl, ethyl, tert-butyl, phenyl, biphenyl or naphthyl;
• R3 is selected from any one of hydrogen, deuterium, halogen, cyano, hydroxyl, amino, sulfanyl, adamantyl, norcamphanyl, substituted or unsubstituted C1 to C12 alkyl, substituted or unsubstituted C2 to C12 alkenyl or substituted or unsubstituted C6 to C30 aryl;
• m1 is an integer selected from 0 to 4, and when m1 is greater than 1, two or more R3 are identical to each other or different from each other, or two adjacent R3 are joined to form a ring;
• and
• wherein the structure as shown in Formula III is selected from any one of the following groups: