NOVELTY - A light concentrator has core(s), material with lower index of refraction than the core and is in contact with portion of core surface, nanostructures that absorb light impinging on surface of concentrator and emit light, and collector(s) that collects waveguided light.    USE - Used as light concentrator.    ADVANTAGE - The invention provides high dielectric constant nanocomposite.    DETAILED DESCRIPTION - The light concentrator comprises core(s); material with lower index of refraction than the core and is in contact with portion of core surface; nanostructures that absorb light impinging on surface of concentrator and emit light, and are located or oriented within the concentrator such that a fraction of light emitted by the nanostructures that is waveguided by the core is greater than (1/2)x(cos(asin(n1/n2))-cos(pi-asin(n1/n2))); and collector(s) that collects waveguided light and is operably connected to the core.    n1 = refractive index of material;and    n2 = refractive index of core.    INDEPENDENT CLAIMS are also included for:    (1) a waveguide comprising a cladding and a core having first and second surfaces;    (2) a composite material comprising nanowires and small molecule or molecular matrix comprising polymer;    (3) a film formed from the composite material;    (4) a composition comprising particles of the composite material, solvent, and glue;    (5) a substrate to which the composition has been applied;    (6) a method of making the composite material comprising preparing branched nanowire(s) or inorganic nanowires and combining the nanowires and organic polymer or inorganic glass precursors of small molecule or molecular matrix; and    (7) a method of making a composition comprising preparing particles of the composite material and combining the particles with solvent and glue.    DESCRIPTION OF DRAWING(S) - The figure schematically depicts a quantum dot solar concentrator.    Sheet (1)    Solar cell (2)    Light source (3)    Light (4)    Dye molecules (5)