Abstract: A thermophotovoltaic device (10) includes an energy source (12) compatible with thermophotovoltaic cells and thermophotovoltaic cells (14). A filter (16), adapted to filter out long wavelength energy, is positioned between the energy source (12) and the thermophotovoltaic cells (14). The filter (16) has dual walls (30 & 32) with a low conductivity space (34) between the walls (30 & 32) which is adapted to break the convection heat transfer path from the energy source (12) to the thermophotovoltaic cells (14).

Abstract: A planar concentrator solar power module has a planar base, an aligned array of linear photovoltaic cell circuits on the base and an array of linear Fresnel lenses or linear mirrors for directing focused solar radiation on the aligned array of linear photovoltaic cell circuits. The cell circuits are mounted on a back panel which may be a metal back plate. The module includes a voltage stand-off layer and heat spreader layer. The cell circuit array may include multiple sets of cells formed by dividing planar silicon cells. The cell circuit area is less than a total area of the module. Each linear lens or linear mirror has a length greater than a length of the adjacent cell circuit. The circuit backplate is encapsulated by lamination for weather protection. The planar module is generally rectangular with alternating rows of linear cell circuits and linear lenses or linear mirrors.