First of all, we need to clarify the different definition between a solar panel and a solar cell. A solar photovoltaic cell is an object that usually made of semi-conductor materials and converts the sunlight energy into electrical energy at certain voltage and current through photovoltaic effects. There are mainy 5 types of solar cell: silicon type, amorphous type (a-Si), coppper indium gallium selenide (CIGS) and Cadmium telluride (CdTe).
