A device where sunlight concentrated onto a absorberIn a photovoltaic device, the material that readily absorbs photons... heats it to a high temperature, and the thermal radiation emitted by the absorberIn a photovoltaic device, the material that readily absorbs photons... is used as the energy source for a photovoltaic cell that is designed to maximize conversion efficiencySee photovoltaic (conversion) efficiency. at the wavelength of the thermal radiation.
