Polymeric compound containing dopant and host repeating units and organic electroluminescence element

A polymer comprising a repeating unit A and a repeating unit B,

• wherein the repeating unit A is selected from divalent groups which are derived from compounds represented by formula (1):
• wherein Ar1 to Ar4 are each independently a substituted or unsubstituted aryl group having 6 to 40 ring-forming carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 40 ring-forming atoms, or a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms;
• X is a substituted or unsubstituted aryl group having 6 to 40 ring-forming carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 40 ring-forming atoms, or a substituted or unsubstituted styrene-derived group;
• s is an integer of 0 to 3;
• and
• two or three —NAr3Ar4 groups may be the same or different when s is 2 or 3;
• and
• —NAr3Ar4 is a hydrogen atom when s is 0;
• and
• the repeating unit B is selected from divalent groups which are derived from compounds represented by any one of formulae (2) to (6):
• wherein R is a substituted or unsubstituted aryl group having 6 to 40 ring-forming carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 40 ring-forming atoms, or a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms;
• a is an integer of 0 to 6;
• b is an integer of 0 to 8;
• and
• c is an integer of 0 to 10.