Solar photovoltaic technology is a technology that converts solar energy into electricity. Its core is a semiconductor material that can release electrons. The most commonly used semiconductor material is silicon. Solar photovoltaic cells have two layers of semiconductors, one is a positive electrode and the other is a negative electrode. When sunlight shines on a semiconductor, currents are generated at the junction of the two electrodes. The greater the intensity of sunlight, the stronger the current. Solar photovoltaic systems can not only operate under strong sunlight, but also generate electricity on cloudy days. Due to the reflection of sunlight, the weather in less clouds is even better than that in sunny days. Comparison of three major photovoltaic cell technologies At present, there are mainly three kinds of photovoltaic power generation technologies: crystalline silicon solar cells, thin-film solar cells, and concentrating solar cells. Among them, crystalline silicon cells are the most widely used, accounting for more than 80%; thin-film batteries have grown rapidly in recent years, accounting for more than 10%; Photovoltaic cells have a few applications. Among these three kinds of photovoltaic power generation technologies, the advantages of crystalline silicon cells are their high conversion efficiency and small footprint. The disadvantage is that silicon consumes large amounts of electricity and is costly, and is suitable for urban areas. The advantages of thin-film solar cells are low silicon consumption. Low cost, the disadvantage is low conversion efficiency, large investment, large attenuation, large area, more suitable for the integration of grid-connected power stations and building photovoltaics in remote areas; the advantages of concentrating cells is high conversion efficiency, the disadvantage is that they cannot use scattered In the sun, the tracker must be used to adjust the system precisely to the sun. Currently, it is mainly used in aerospace. It is expected that in the future PV power generation will present a variety of technologies coexisting and work together to reduce costs. Table 1 Comparison of Three Major PV Generation Technologies Although thin-film batteries are currently inefficient, the conversion efficiency of thin-film batteries using a thin-film, multi-pn junction structure can reach 40%-50%. Therefore, high-efficiency batteries in the future will ultimately require a thin film technology route. Among the various thin-film batteries, only silicon thin-film batteries have abundant reserves of raw materials, are non-toxic and non-polluting, and have more sustainable development prospects. Silicon thin-film batteries can be further divided into amorphous silicon films, microcrystalline silicon films, and polycrystalline silicon films. Comparison of the four major polysilicon technologies At present, the most widely used crystalline silicon solar cells, the main raw material is polysilicon, on the polysilicon production, currently used mainly in four kinds of processes, namely: modified Siemens, silane method, circulating fluidized bed method, physical method. Of these four technologies, the modified Siemens technology is the most mature and has been applied on a large scale. Currently, 80% of the world's polysilicon production adopts the improved Siemens production route. The disadvantages are high cost and complicated by-product recycling technologies; the silane method is currently only available. In the United States, there is a company producing, the advantage is high quality, the disadvantage is the danger, process requirements; fluidized bed method can increase the utilization of raw materials in polysilicon production, low cost, the disadvantage is that the technology is not yet mature, currently only the United States 1 Enterprises use this technology; the biggest advantage of the physical method is low cost, the disadvantage is that it does not solve the problem of industrial production, product stability is not enough, purity is not enough. Pvc Chain Link Fence,Pvc Coated Rhombus Chain Link Fence,Pvc Chain Link Shenzhou City Hongda Hardware Products Co.,Ltd , https://www.hdgabion.com