At 18:00 on May 5th, Beijing time, the Changzheng No. 5 B carrier rocket developed for the Chinese manned space station project, carrying a new generation of manned spaceship test ship and a flexible inflatable cargo return module test module, ignited at the Wenchang space launch site in China air. As the "PLUS version" of the Shenzhou spacecraft, the new generation manned spacecraft test ship of 6 to 7 seats is twice the configuration of the 3 seater Shenzhou spacecraft.
On the solar cell wing of the new-generation manned spaceship test vessel, the first high-efficiency gallium arsenide solar cell with a photoelectric conversion efficiency of 34% developed by the Shanghai Aerospace Technology Research Institute 811 of the China Aerospace Science and Technology Group was used for the first time. According to reports, this is also the current The solar cell with the highest photoelectric conversion efficiency in the international space.
The solar cell wing is the wing on which the spacecraft continues to fly and is the power source of the spacecraft. Its performance and reliability are directly related to whether the spacecraft can successfully complete the scheduled mission.
Zhong Danhua, the chief designer of the energy management function of the 811 new generation manned spacecraft test vessel, introduced that in the future manned moon landing project, new generation manned spacecraft, manned lunar landing and ascent aircraft missions, the sun with high efficiency and high specific power Battery technology is the key technology and necessary demand. The 34% photoelectric conversion efficiency battery will effectively improve the power generation capacity of China's space and deep space vehicles and support the replacement of China's space power system.
According to reports, the main power source for solar cell wings in space applications is mainly solar cells with a photoelectric conversion efficiency of 30%. Previously, the highest efficiency solar cell circuit product photoelectric conversion efficiency of space model applications in the world was 32%.
From 30% to 32% to 34%, it seems that only 2% of the conversion efficiency is improved, but it can be said that the technical system is "a leaping on the spire". To this end, the developers have carried out a series of technical problems, such as the use of new wide / medium band gap semiconductor materials covering short-wave and medium-wave sunlight, to further reduce carrier heat loss, improve the energy utilization of the solar spectrum, and overcome and solve Difficulties in the growth of compounding materials, wide-spectrum and low-reflectance compounding technology, etc., to reach the international advanced level. (Zheng Yingying Guo Chao Kai Miao Xin Pei)
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