Japan to improve perovskite solar cell conversion rate
According to the Ministry of Science and Technology December 5 news, according to local media reports in Japan, for a new generation of solar cells ("perovskite solar cells" materials, advanced science and technology research center of Tokyo University research Staff, without the use of rubidium and other rare metals under the premise of achieving a high conversion efficiency of 20.5% and stable power generation. The study has realized the stability of the crystalline structure by adding more potassium elements present on Earth. Research group in the long-term durability test at the same time, facing Matsushita, Toshiba and other enterprises practical evaluation and discussion.
The so-called perovskite solar cells, is the use of a perovskite crystal structure of this material solar cells. Compared with the current mainstream of silicon solar cells, the manufacturing process is simple, low manufacturing costs. At present, solar cells with a practical conversion efficiency of more than 20% are used, and rare metals such as rubidium and cesium are used to maintain the structural stability.
The University of Tokyo's research team, by adding potassium to maintain the crystalline structure under certain conditions, succeeded in producing defect-free structured power layers without the use of rare metals at all. Since the electron flow is not hindered, the conversion efficiency is improved Power generation stability.