MEJORAS EN COLECTOR SOLAR LUMINISCENTE

The collector and concentrator comprises a thin luminescent layer 14 on a transparent support 12 and has a small surface area for coupling to a photovoltaic solar cell 18 which receives a major part of the luminescence by internal reflection within the collector. The refractive indices of layers 12, 14 should be close or equal and the thickness ratio of the layers is at least 4:1. The layers may be glass doped with uranyl, chromium or manganese ions, or a polysiloxane or polymethacrylate, and have silvered side surfaces. The layer 14 may contain two luminescent species operating in cascade or the layer 12 may be luminescent and operate in cascade. A silicon cell 18 is coupled by an anti-reflective coating and a layer of oil.