Polymeric fluorescent substance and polymer light-emitting device using the same

摘要

Provided is a polymeric fluorescent substance comprising a copolymer which has a substituent containing a specific aromatic amine structure below in the side chain, wherein X₁ is a divalent hydrocarbon group; Ar₂ is an arylene group or the like; Ar₃ and Ar₄ independently represent an aryl group or the like. The polymeric fluorescent substance is preferably used for a light emitting layer of a polymer LED having high luminance and high light emitting efficiency.