Single-crystal Silicon And Multi-component Compound Thin Films

To enhance everyone's understanding of 51.2V 10kWh lifepo4 batteries, this article will introduce the high-voltage solar battery of single crystal silicon and the high-voltage solar battery of multi-component compound film. If you are interested in High Voltage solar batteries, please continue reading.

• Monocrystalline Silicon High Voltage solar battery

• Multi-component compound film High Voltage solar battery

Monocrystalline Silicon High Voltage solar battery

Among silicon series High Voltage solar batteries, monocrystalline silicon large solar cells have the highest conversion efficiency and the most mature technology. High-performance monocrystalline silicon cells are based on high-quality monocrystalline silicon materials and related heat-generating processing techniques. Now the electrical and ground technology of monocrystalline silicon is nearly mature. In the production of batteries, technologies such as surface texturing, emitter passivation, and partition doping are generally used. The developed batteries mainly include planar monocrystalline silicon batteries and groove-buried Gate electrode monocrystalline silicon cells. The improvement of conversion efficiency mainly depends on the microstructure treatment of the surface of single-crystal silicon and the partition doping process. In this regard, the Institute of Solar Energy Systems in Fraunhofer Freiburg, Germany maintains a world-leading level. The Institute used photolithography to texture the surface of the battery to make an inverted pyramid structure. And put a 13nm on the surface. A thick oxide passivation layer is combined with two anti-reflection coatings. Increase the ratio of the width and height of the grid through the improved electroplating process: the conversion efficiency of the battery obtained through the above is more than 23%, and the maximum value can reach 23.3%. The large-area (225cm2) single crystal High Voltage Lithium Battery prepared by Kyocera has a conversion efficiency of 19.44%. The domestic Beijing Solar Energy Research Institute is also actively conducting research and development of high-efficiency crystalline silicon High Voltage solar battery, and the developed planar high-efficiency monocrystalline silicon battery (2cm X 2cm) conversion efficiency reaches 19.79%, and the conversion efficiency of grooved buried gate electrode crystalline silicon cell (5cm X 5cm) reaches 8.6%.

Monocrystalline silicon solar battery 48v 200ah has undoubtedly had the highest conversion efficiency and still occupies a dominant position in large-scale applications and industrial production. If it remains high, it is very difficult to significantly reduce its cost. To save high-quality materials and look for alternatives to monocrystalline silicon batteries, thin-film High Voltage solar batteries have now been developed, of which polycrystalline silicon thin-film High Voltage solar batteries and amorphous silicon thin-film High Voltage solar batteries are typical representatives.

Multi-component compound film High Voltage solar battery

To find a substitute for monocrystalline silicon batteries, in addition to developing high-voltage solar batteries made of polycrystalline silicon and amorphous silicon thin films, people are also constantly developing high-voltage solar batteries made of other materials. These mainly include gallium arsenide III-V compounds, cadmium sulfide, cadmium sulfide, and copper indium selenium thin film batteries. Among the above-mentioned batteries, although the efficiency of polycrystalline thin-film batteries of cadmium sulfide and cadmium telluride is higher than that of amorphous silicon thin-film High Voltage solar batteries, the cost is lower than that of monocrystalline silicon batteries and is also easy to mass-produce. But because cadmium is highly toxic, it will cause serious pollution to the environment. Therefore, it is not the most ideal replacement for crystalline silicon High Voltage solar batteries. Gallium arsenide III-V compounds and copper indium selenium thin film batteries have attracted widespread attention due to their high conversion efficiency. GaAs belong to III-V compound semiconductor materials, and their energy gap is 1.4eV, which is just the value of the high absorption rate of sunlight. Therefore, it is an ideal battery material. The preparation of III-V compound thin-film batteries such as GaAs mainly adopts MOVPE and LPE technologies, and the preparation of GaAs thin-film batteries by MOVPE is affected by many parameters such as substrate dislocation, reaction pressure, III-V ratio, and total flow. In addition to GaAs, other III-V compounds such as Gasb, GaInP, and other battery materials have also been developed. In 1998, the conversion efficiency of GaAs battery backup solar produced by the Institute of Solar Energy Systems in Freiburg, Germany was 24.2%, which was the European record. The conversion efficiency of the GaInP battery prepared for the first time was 14.7%. In addition, the institute also used a stacked structure to prepare GaAs and Gasb batteries. The battery is stacked with two independent batteries together, GaAs is used as the upper battery, and the lower battery uses Gasb, and the resulting cell efficiency reaches 31.1%.

Copper indium selenium CuInSe2 is referred to as CIC. The energy of CIS material is reduced to 1. leV, which is suitable for the photoelectric conversion of sunlight. In addition, CIS thin film solar cells do not have the problem of light-induced degradation. Therefore, the use of CIS as a high conversion efficiency thin-film LFP energy storage material has also attracted people's attention. The preparation of CIS battery thin film mainly includes the vacuum evaporation method and the selenization method. The vacuum evaporation method uses its evaporation source to evaporate copper, indium, and selenium, and the selenization method uses H2Se laminated film selenization, but this method is difficult to obtain CIS with uniform composition. The conversion efficiency of CIS thin-film batteries has grown from 8% in the 1980s to about 15% at present. As the semiconductor material of High Voltage solar batteries, CIS has the advantages of low price, good performance, and simple process, and will become an important direction for the development of High Voltage solar batteries in the future.

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