| abstract |
An apparatus includes a light concentrator, which during operation directs light from an input opening and an output opening, and a photovoltaic device positioned relative to the output opening to receive the light. The light concentrator includes a hollow body formed of a pair of separate side walls and an exit wall connecting the side walls, each side wall being formed of a material having a first index of refraction, n1, the exit wall includes a first element having an exit surface placed in the exit opening, the first element being formed of a material having a second refractive index n2, and the hollow body contains a liquid having a refractive index, n3, where n3 <n1 and n3 <n2. |