CHARGE-TRANSPORTING POLYMER, COMPOSITION FOR ORGANIC ELECTROLUMINESCENT ELEMENT, ORGANIC ELECTROLUMINESCENT ELEMENT, ORGANIC EL DISPLAY DEVICE AND ORGANIC EL ILLUMINATING DEVICE

摘要

Disclosed is a charge-transporting polymer having high hole-transporting ability, excellent solubility and excellent film-forming properties.  Also disclosed are a composition for organic electroluminescent elements containing the charge-transporting polymer, and an organic electroluminescent element having a high current efficiency and high driving stability. The charge-transporting polymer is characterized by containing a group represented by formula (1) as a side chain. (In formula (1), the benzocyclobutene ring may have one or more substituents, and the substituents may combine together to form a ring; and the spacer represents a group which connects the benzocyclobutene ring with the main chain of the charge-transporting polymer through three or more single bonds.)