The solar cells are semiconducter junction device which are used for converting sunlight into electrical energy. The generated electric voltage is proportional to the intensity of incident light.due to their capability of generating voltage , they are called as photovoltatic cells
A number of solar cells are used in series and the resulting power is significant.solar cells can supply power for the electronic equipment aboard a satellite over a long period of time.special design is required for contacts.a large area junction should be located near the surface of device.this is usually done by construction planar junction by diffusion or ion implantation
