Photovoltaic power generation is the main principle of the photoelectric effect of the semiconductor. Photons illuminate to metal, its energy can be absorbed by all metal in an electronic, electronic absorption energy is enough big, can overcome the metal internal gravity work, left to escape from a metal surface, become a photoelectron. Silicon atoms have four outer electrons, if in the pure silicon doped with five outer electrons of the atoms such as phosphorous, becomes the n-type semiconductor; If in the pure silicon doped with three outer electrons of the atoms such as boron atoms, forming p-type semiconductors. When the P and N together, contact surface will form a potential difference, become a solar cell. When the sun to the p-n junction, hole from N to P polar polar mobile, electronic consists of N to P polar polar mobile, a current.
The photoelectric effect is the uneven illumination semiconductor or generate an electrical potential difference between different parts of the semiconductor and metal combination. It is first and foremost by the photons (light) into electronic process, the light energy into electrical energy; Secondly, the forming process of voltage.
Polysilicon after, ingot, ingot casting slice, program, made for processing wafers. On silicon doping and diffusion trace amounts of boron, phosphorus, etc., forming a p-n junction. Then use silk screen printing, will be fine with good silver paste printed on silicon gate line, after sintering, made back electrode at the same time, and in a grid line surface coated with a layer of antireflection coating on the cell is made at this point. Battery slice of permutation and combination into components, it is made up of a large circuit board. Generally around the component package aluminum frame, front cover glass, negative electrode installation. A battery components and other auxiliary equipment, can be composed of power systems. In order to direct current into alternating current (ac), need to install the current converter. After power storage battery are available, and also can enter the public grid. Cost of power generation system, battery components accounted for about 50%, current transformer, installation expenses and other accessories and other fees accounted for another 50%.