| abstract |
This invention provides novel pi-sigma conjugated polymers. The polymers are suppressed in the deterioration of color purity of EL caused by excimer formation in spite of their being pi-sigma conjugated fluorene polymers, and particularly, the blue light emitted therefrom has extremely high color purity. The electroluminescent polymer has a repeating unit as represented in formula (I) (in which R1, R2, R5 and R6 are independently a hydrogen atom or a substituent, R3 and R4 are independently aryl group or alkyl group, and q is 1 or 2.) |