The Studies Of Thin Crystalline Silicon Solar Cells And Electrode System

Enhancement of conversion efficiency and reduction of production costs are two main research topics of solar cells. The silicon wafers contribute a lot to the total product cost of crystalline silicon solar cells. One way of lowering the wafer cost is by reducing the thickness of the silicon wafers. Crystalline silicon solar cells are having a trend towards using thin wafers. Reducing the thickness of the silicon wafers has two disadvantages because silicon is indirect band gap material, on one hand it reduces short circuit and has effects on the open-circuit voltage of solar cells, on the other hand silicon wafers are prone to break, especially in the process of screen printing electrode. After the firing of the electrode, the bending of the cell resulting from the mismatch between metal electrode and silicon wafers makes it more difficult in handling and encapsulation of these thin wafers, which will also result in the cell broken. Focusing on these problems stated above for thin crystalline silicon solar cells, this paper developed experiment research on its industrialization manufacture techniques. Some new techniques are applied to structure and process of the cell and gain better results. These techniques are as follows:The investigation of monocrystalline silicon wafer surface texture technology, Based on the basic principles of surface texturing and...