NOVELTY - The luminescent converter (101) comprises magic-sized clusters (110) of luminescent material, additional fluorophores besides the magic-sized clusters (MSCs), and an element for guiding light emitted by the MSCs to a target location. The MSCs: have a diameter of less than or equal to 3 nm; are symmetric crystallites; comprise a compound of two elements consisting of IV and VI groups, II and VI groups, III and V groups of the periodic table of elements, or a single element from group IV of the periodic table of the elements; and are covered with a coating that comprises an organic material.    USE - The luminescent converter is useful as a luminescent solar concentrator in a solar power generator (claimed), and for converting parts of the spectrum of incident light to larger wavelengths, where the luminescent solar concentrator is useful: for spectral down conversion in LEDs or other lighting applications; to collect the incident light in a large area; and to concentrate the incident light onto the solar cell.    ADVANTAGE - The luminescent converter can be efficiently and economically manufactured with improved performance and optical properties, high stability, long lifespan and reduced size, increases the overall efficiency of the solar converter, and efficiently reduces the reabsorption losses due to self-absorption.    DETAILED DESCRIPTION - The luminescent converter (101) comprises magic-sized clusters (110) of luminescent material, additional fluorophores besides the magic-sized clusters (MSCs), and an element for guiding light emitted by the MSCs to a target location. The MSCs: have a diameter of less than or equal to 3 nm; are symmetric crystallites; comprise a compound of two elements consisting of IV and VI groups, II and VI groups, III and V groups of the periodic table of elements, or a single element from group IV of the periodic table of the elements; are covered with a coating that comprises an organic material and/or an inorganic semiconductor; have different sizes, which are distributed in such way that radiative or non-radiative energy transfer take place between the MSCs; and are embedded in the light guiding element and/or in a thin film on the surface of the light guiding element. The concentration of bigger MSCs is smaller than that of smaller MSCs. The concentration of the MSCs varies spatially within the luminescent converter having lower values near a border of the luminescent converter. The fluorophores includes organic dyes, inorganic phosphors, or quantum dots or quantum rods. The light guiding element is made of a glass or a polymer INDEPENDENT CLAIMS are included for:    (1) a solar power generator; and    (2) a method of manufacturing a luminescent converter.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic perspective view of a solar power generator with a luminescent solar concentrator.    Solar power generator (100)    Luminescent converter (101)    Magic-sized clusters (110)    Matrix (120)    Solar cells (130)    Mirrors. (140)