Abstract: Most of the power is produced by using fossil fuels, which emits Tons of carbon-dioxide and other pollutants in every second. Because of increase in demand of clean energy, the solar industry is the most growing forces in the market. Solar energy is one of the most important sustainable and non conventional energy sources. Photovoltaic is the straight conversion of sunlight into electrical energy with the help of solar batteries. There are many materials and techniques which are used for the fabrication of solar batteries which is based on low and high conversion efficiency. The first material use to make solar cells is silicon but its drawbacks are costly and less efficient .In recent time the solar cells manufacturing technologies are the thin-film solar cell which are use to produce electrical energy. On the basis of higher efficiency, the Thin-Film solar cells are manufactured and compared with traditional silicon solar cells. The Thin-Film solar cells are composed of several layers that reduce the current losses. When sunlight strives at the solar cell, photons with higher energy will be absorbed by higher layers and vice versa and low energy photons will be absorbed with lower layers which are made of thin film solar cells that lead to prevention of wasting energy. The comparison between thin film CdTe and traditional solar cell technology carried by other researchers to compare the thin film solar cells such as traditional silicon and cadmium telluride solar cell to indicate that thin film solar cells like CdTe are more economical than the traditional solar cells.
Keywords: Photo voltaic, thin film solar cells, CdTe Thin-film, Photo voltaic, Solar cell fabrication, silicon thin film.