High efficiency solar micro module technology is based on aerospace power products. Its conversion efficiency is 30-35%, module thickness is less than 1 mm, and it has good high energy density and special environmental resistance. It is light weight. It can be used for continuous power supply of wearable devices and micro devices, It can also realize the micro area composite.
Silicon and single junction arsenide solar cells can only absorb sunlight in a specific spectral range, and their conversion efficiency is not high. If the iil-v materials with different band gap width (E) are used to fabricate cpv 3j solar cell, they are stacked from top to bottom according to the size of E. By selectively absorbing and converting different sub domains of the solar spectrum, the photoelectric conversion efficiency of solar cells can be greatly improved.
CPV 3j solar cell have the characteristics of high efficiency, long life and high reliability, which can be widely used in various aerospace vehicles. Compared with foreign countries, the research and development of cpv 3j solar cells in China started relatively late. However, with the strong support of the "10th Five Year Plan", "11th Five Year Plan" and national "973" projects, the current research and development level is close to that of foreign similar batteries, and has been successfully applied in many satellite models.
In the next few years, we still need to closely track the latest technology and progress of foreign arsenicizers' solar cells, have the courage to innovate and constantly improve, so as to create high-quality, high reliable and low-cost cpv 3j solar cells for China's aerospace field and photovoltaic industry.