Display panel and display apparatus

A display apparatus, comprising the display panel;

• wherein the display panel comprises a driving backplane, a pixel electrode layer, a light-emitting functional layer, and a common electrode layer stacked in sequence;
• the light-emitting functional layer comprises a common material layer that covers the gaps between a plurality of light-emitting elements;
• at least one of the common material layers comprises a hole-transport-type nitrogen-containing compound, the structural formula of which is shown in Chemical Formula 1:
• wherein, L1, L2, L3 are each independently selected from a single bond, a substituted or unsubstituted phenylene, a substituted or unsubstituted biphenylene, a substituted or unsubstituted naphthylene, a substituted or unsubstituted phenanthrenylene, a substituted or unsubstituted triphenylene, a substituted or unsubstituted 9,9′-dimethylfluorenylene, a substituted or unsubstituted 9,9′-diphenylfluorenylene, a substituted or unsubstituted spirofluorenylene, a substituted or unsubstituted carbazolylene;
• Ar1 to Ar3 are each independently selected from a substituted or unsubstituted aryl with 6 to 50 ring carbon atoms, a substituted or unsubstituted heteroaryl with 5 to 40 ring carbon atoms, and —N(Ar4Ar5);
• Ar4 and Ar5 are each independently selected from a substituted or unsubstituted aryl with 6 to 50 ring carbon atoms, a substituted or unsubstituted heteroaryl with 5 to 40 ring carbon atoms;
• wherein at least one of Ar1 to Ar3 contains a benzopentacyclic fragment or a dithiophene fragment;
• when L1, L2, L3, Ar1, Ar2, Ar3, Ar4 or Ar5 has a substituent, the substituent is selected from deuterium, halogen, substituted or unsubstituted alkyl with 1 to 10 carbon atoms, substituted or unsubstituted cycloalkyl with 5 to 10 carbon atoms, substituted or unsubstituted aryl with 6 to 30 carbon atoms, and substituted or unsubstituted heteroaryl with 5 to 30 carbon atoms.