X-ray radiation influence on photoluminescence spectra of composite thin films based on C₆₀

Photoluminescence spectra of composite thin films based on C₆₀ before and after X-ray irradiation, as well as the results of quantum-chemical calculations of corresponding molecular complexes are presented. Fullerene films doped by CdTe with various concentrations were obtained by means of vacuum co-evaporation in a Knudsen cell. Composition and surface morphology were measured by secondary electron microscopy and energy-dispersive X-ray spectroscopy. X-ray irradiated films were considered, and additional peaks in photoluminescence spectra were detected. These peaks appear as a result of molecular complexes formation from C₆₀CdTe mixture and dimerization of the films. Density functional B3LYP quantum-chemical calculations for C₆₀CdTe, molecular complexes, (C₆₀)₂ and C₁₂₀O dimers were performed to elucidate some experimental results