NOVELTY - The composite material comprises two constituents, one of which is present in the form of crystalline nanoparticles containing three metals and non-metal, where the diameters of the nanoparticles are less than 200 nm. The X-ray reflection of the nanoparticles is indicated by definite widening. The size of the nanoparticles is electronmicroscopically determinable. The nanoparticles are embedded in a matrix made of other components of the composite material. The composite material contains organic compound. The nanoparticles are present in one of the other components of the composite material.    USE - Composite material for producing a photoactive layer, which is useful for the production of components with fluorescence properties and/or for the production of components or devices such as solar cells, sensors or detectors and electrical or optical, including ultraviolet-, infrared- and microwave regions, devices, switches, displays or radiation-emitting devices e.g. laser or LEDs (all claimed).    ADVANTAGE - The composite material can be simply and economically produced with excellent optical and electronic properties and high purity without any complex.    DETAILED DESCRIPTION - The composite material comprises two constituents, one of which is present in the form of crystalline nanoparticles containing three metals and non-metal, where the diameters of the nanoparticles are less than 200 nm. The X-ray reflection of the nanoparticles is indicated by definite widening. The size of the nanoparticles is electronmicroscopically determinable. The nanoparticles are embedded in a matrix made of other components of the composite material. The composite material contains an organic compound. The nanoparticles are present in one of the other components of the composite material in a concentration, which is sufficient to form continuous conductive paths between the nanoparticles and the other component. An INDEPENDENT CLAIM is included for a method for producing photoactive layers.    DESCRIPTION OF DRAWING(S) - The diagram shows a diffractogram analysis graph of the nanoparticles and polycrystalline layer.