Nitrogen-containing compounds, electronic elements and electronic devices

A nitrogen-containing compound, wherein the structure of the nitrogen-containing compound is represented by formula I-A:

• wherein L is selected from a single bond, a substituted or unsubstituted arylene with 6-30 carbon atoms, or a substituted or unsubstituted heteroarylene with 1-30 carbon atoms;
• Ar1 and Ar2 are the same or different, and are independently selected from a a substituted or unsubstituted group V, and the unsubstituted group V is selected from the group consisting of the following groups:
• wherein represents a chemical bond;
• there is one or more substituents on the substituted V, and the substituents are independently selected from:
• deuterium, cyano, halogen, methyl, ethyl, n-propyl, isopropyl, tertiary butyl, phenyl, naphthyl, biphenyl or phenanthryl;
• when the number of substituents of V is greater than 1, the substituents are the same or different;
• R1 and R2 are independently selected from deuterium, halogen, cyano, heteroaryl with 3˜20 carbon atoms, aryl with 6˜20 carbon atoms, trialkylsilyl with 3˜12 carbon atoms, arylsilyl with 8˜12 carbon atoms, alkyl with 1˜10 carbon atoms, haloalkyl with 1˜10 carbon atoms, alkenyl with 2˜6 carbon atoms, alkynyl with 2˜6 carbon atoms, cycloalkyl with 3˜20 carbon atoms, heterocyclic alkyl with 2˜10 carbon atoms, cycloalkenyl with 5˜10 carbon atoms, heterocyclic alkenyl with 4˜10 carbon atoms, alkoxyl with 1˜10 carbon atoms, alkylthio with 1˜10 carbon atoms, aryloxy with 6˜18 carbon atoms, arylthio with 6˜18 carbon atoms or triarylsilyl with 18˜24 carbon atoms;
• a is selected from 0, 1, 2, 3 or 4;
• when a is greater than 1, any two R1 are the same or different;
• b is selected from 0, 1, 2 or 3;
• when b is greater than 1, any two R2 are the same or different;
• the substituents of L are independently selected from deuterium, a halogen, cyano, heteroaryl with 3˜20 carbon atoms, aryl with 6˜20 carbon atoms which can be substituted with 0, 1, 2, 3, 4 or 5 substituents independently selected from deuterium, fluorine, chlorine, cyano, methyl and tertiary butyl, alkyl with 1˜10 carbon atoms, haloalkyl with 1˜10 carbon atoms, alkenyl with 2˜6 carbon atoms, alkynyl with 2˜6 carbon atoms, cycloalkyl with 3˜10 carbon atoms, heterocyclic alkyl with 2˜10 carbon atoms, cycloalkenyl with 5˜10 carbon atoms, heterocyclic alkenyl with 4˜10 carbon atoms, alkoxyl with 1˜10 carbon atoms, alkylthio with 1˜10 carbon atoms, aryloxy with 6˜18 carbon atoms, arylthio with 6˜18 carbon atoms or phosphinoxy with 6˜18 carbon atoms.