PHOTOLUMINESCENT PROPERTIES OF THICK FILMS OF CESIUM COPPER (I) HALIDES

The paper presents the results of investigation of polycrystalline powders and films of CsCu₂Br₃ and CsCu₂I₃ compounds obtained by vacuum thermal evaporation. X-ray phase analysis confirmed the formation of single-phase films which correspond well to the initial compositions. The microstructure of the films was studied by scanning electron microscopy. It was found that CsCu₂I₃ and CsCu₂Br₃ films consist of rounded crystals ranging in size from tens nanometers to 200 nm. The obtained results confirm the potential of compounds CsCu₂Br₃ and CsCu₂I₃ for its application in the field of optoelectronics, however, it is necessary to increase the duration of sputtering of materials to form thicker and more continuous films.