Progress in low cost solar cells

The solar cell is a remarkable device. It converts the sun´s distributed energy into electricity with 15 to 20 percent efficiency, has no moving parts, is simple in structure and in the case of silicon is made of one of the most abundant elements on earth. Such a device would give a clean, quiet source of power and an alternative to the nuclear reactor. The talk will discuss the problems that need to be solved in the solar cell technology before this comes about. The chief problem is that of economics. It will be shown that savings in poly-Si, single crystal growth and fabrication may result in a reduction of solar cell cost of over one hundred. A brief overview of ERDA´s photovoltaic program will be presented. The program is growing rapidly and represents a great opportunity for researchers in electron devices to make a contribution to the nation´s energy program. The discussion will give an update on progress in Si technology including single crystal as well as poly crystalline cells. Progress in II-VI and III-V photovoltaic devices will also be included. Problem areas will be emphasized. Suggestions will be made for further materials and device contributions.