[The thin film and absorption spectra of CsCu2I3].

This paper introduces a method of manufacturing CsCu2I3 thin films through hot evaporation. According to the absorption spectra at low temperature, the excitonic coefficient of CsCu2I3 was calculated. The spectral analysis shows that the localization of electron and exciton excitations in the twofold Chain created by CuI4(3-) causes the complicated character of the optical spectra of CsCu2I3.