Patent ID: 8389985

Claim:
A color conversion film, comprising: a conjugated high molecular weight copolymer that has a structure represented by formula (1): wherein, Ar represents an arylene group or divalent heterocyclic group, R 1 and R 2 respectively and independently represent a hydrogen atom, alkyl group, alkoxy group, alkylthio group, alkylsilyl group, alkylamino group, aryl group, aryloxy group, arylalkyl group, arylalkoxy group, arylalkenyl group, arylalkynyl group, monovalent heterocyclic group, amino group, nitro group, halogen group or cyano group, and n represents an integer of 1 to 10000, and wherein the conjugated high molecular weight copolymer has a green emission peak wavelength of 490 to 580 nm when in the form of a thin film, having high fluorescent quantum yield of 80 to 90%.