Non-substituted poly(phenylenevinylene) (PPV) is an insoluble material. Ikeda et al. synthesized Amylose-PPV (APPV), which is PPV wrapped in amylose, by applying precursor route synthesis of PPV in the presence of amylase; APPV is soluble in dimethylsulfoxide. Comparison of the absorbance and the PL spectrum of APPV film with those of other organic films indicated the PL efficiency of APPV film as 0.28-0.43. The PL efficiency of PPV film is 0.27. Therefore, the amylose wrapping might improve the PL efficiency of PPV. The OLEDs emitted a green light when the OLEDs were fabricated with APPV as an emitting layer.