Photovoltaics IV: Advanced materials: Both polycrystalline and tandem cells promise higher efficiencies than silicon

Considers the use of compound semiconductors for the fabrication of solar cells with high efficiency such as polycrystalline, tandem and single-crystal cells. The variety of compounds showing promise for this application are mentioned, as are several binary compound semiconductors which are presently under study. The low-cost processes being developed for the fabrication of solar cells are also briefly mentioned.