Abstract
We studied dependence of the photoluminescence spectra of the PVK-C60 nanocomposites synthesized by vacuum evaporation on the fullerene concentration as well as the temperature of the samples. Our experiments show that exposure of the PVK-C60 composites to a 514.5 nm irradiation induces reversible changes leading to heterogeneous concentration-dependent modifications of the photoluminescence spectra.