Brief introduction of two kinds of batteries for solar street lights

Thin-film solar cells are made of low-cost glass, stainless steel or plastic substrates coated with a relatively thin photosensitive material. Compared with crystalline silicon solar cells that use more materials, the cost is lower, and its price advantage can offset the current low price. The problem. There are three types of thin-film photovoltaic cell materials that have been commercialized at present: amorphous silicon (a-Si). Passive production can be completed when the output reaches a certain amount, and at the same time, the process of producing components is also optimized. The production process of thin-film battery modules requires less household materials than crystalline silicon battery modules. The long-term abundance of silicon also brings opportunities for thin-film technology to expand market share. Crystalline silicon batteries are still the mainstream of solar street light batteries. Although technically speaking, crystalline silicon is not the best raw material, but it is easy to obtain, and the application technology is similar to that of the electronics industry. The highest practical retention of crystalline silicon single crystal solar cells can reach 25%. In addition to performance, the thickness of the cells is also very demanding. Thin silicon wafers mean less waste of silicon raw materials, thereby reducing costs. The average thickness of the silicon wafer has been changed from 2003. 0.23mm reduced to 2007's. 0.18mm. At the same time, the average performance increased from 14% to 16%. By 2010, the thickness of the silicon wafer was reduced to 0.15mm, and the performance was selected to 17.5%.