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    Scientists develop new photovoltaic materials to achieve a breakthrough in photoelectric conversion efficiency of 10%
    Hits:   Date:2020-08-14  
    The University of Science and Technology of China has developed a hydrothermal deposition method to prepare selenium antimony sulfide semiconductor thin film materials and applied it to solar cells, achieving a breakthrough in photoelectric conversion efficiency of 10%.
     
    Selenium antimony sulfide is an emerging photovoltaic material used in the photovoltaic field in recent years. Its band gap is adjustable in the range of 1.1-1.7 electron volts to meet the best solar spectrum matching. At the same time, selenium antimony sulfide has a high absorption coefficient, and a film with a thickness of about 500 nanometers can achieve the best absorption; therefore, it also has potential applications in ultra-light and portable power generation devices.
     
    In view of the good stability and abundant element reserves of selenium antimony sulfide, the further improvement of photoelectric conversion efficiency is expected to promote the application. The hydrothermal deposition method developed by this research result can generate dense, flat and uniform light absorption film with horizontal element distribution in the supercritical state by hydrothermal deposition, which is conducive to carrier transmission, combined with light absorption, anion and cation The adjustment of the ratio and the control of point defects finally achieved a breakthrough in photoelectric conversion efficiency. From the perspective of material preparation, the hydrothermal deposition method developed by this research is a simple and low-cost thin film preparation method.