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

摘要

A polymeric fluorescent substance exhibiting visible fluorescence in the solid state, having a polystyrene reduced number average molecular weight of 1 x 10<3> to 1 x 10<8>, and comprising one or more repeating units of formula (1): <CHEM> wherein Ar1 and Ar2 each independently represent an arylene group or the like; Ar3 represents an aryl group or the like having one or more nuclear substituents of formula (2): -Y-Ar4 wherein Ar4 represents an aryl group or the like; and Y represents -CR3=CR4- or -C IDENTICAL C-; X represents -CR1=CR2- or -C IDENTICAL C-; and n is 0 or 1. The triarylamine type polymeric fluorescent substance is excellent in quantum yield of fluorescence and in light emitting efficiency when made into a device.