This report covers the research activities in SERI's Photovoltaic Research Branch during the period 1 October 1979 to 31 March 1980. It includes separate reports on: solid-state theory, high-efficiency cells, thin-film cells, silicon purification, silicon crystallization, thick-film technology, surface and interface analysis, and growth of GaAs and related compounds by metal-organic chemical vapor deposition.

This report covers SERI research activities on solid-state theory, high-efficiency cells, thin-film cells, silicon purification, silicon crystallization, thick-film technology, surface and interface analysis, and growth of GaAs and related compounds by metal-organic chemical vapor desposition.