New polymeric fluorescent substance and polymer light-emitting device using the same

摘要

A polymeric fluorescent substance showing fluorescence in the solid state, having a polystyrene reduced number-average molecular weight of 10<3> to 10<8>, and comprising one or more repeating units of formula (1) and one or more repeating units of formula (2) which is different from formula (1), <CHEM> exhibits strong fluorescence and/or excellent charge transporting property, and a high performance polymer LED which can be driven at low voltage and high efficiency is obtained.