The Hong Kong Polytechnic University held a press conference on the 12th, saying that the school has recently successfully developed the world's highest energy conversion efficiency perovskite/monocrystalline silicon tandem solar cell with energy conversion efficiency as high as 25.5%.
The research team led by Prof. Xu Xingquan from Department of Electronics and Information Engineering of the Hong Kong Polytechnic University recently succeeded in setting a record for the energy conversion efficiency of perovskite/monocrystalline silicon tandem solar cells with a number of innovative technologies. The results of this section estimate that the production cost of solar energy can be reduced from the current 3.9 HKD per watt of silicon-based solar cells to 2.73 per watt.
Xu Xingquan said that perovskite solar cells have an energy conversion rate of only 3.8% when they were introduced in 2009. Perovskite solar cells have become a hot research topic and have been considered as a highly efficient energy source because of the superior photovoltaic performance of perovskite materials. The most promising emerging materials for solar cells. Researchers around the world are committed to finding new ways to effectively increase energy conversion efficiency to promote sustainable energy development.
The solar spectrum consists of different energy bands, and combines a variety of photovoltaic materials to make solar cells, which can increase the energy absorbed by the battery. Xu Xing's research team has used this feature in conjunction with three innovative methods to further improve battery performance: First, the use of chemical reactions, oxygen low-temperature passivation process to reduce the impact of perovskite material defects; second is to enhance the transparency of the electrode in the long-band , More light energy into the silicon battery under the perovskite battery; Third, the production of bionic petals trap film, "adsorbed" on the surface of solar cells, so that the battery to capture more light.
Xu Xingquan pointed out that this research work has been completed in cooperation with universities in the Mainland and other departments of the Hong Kong Polytechnic University. Among them, the design and manufacture of the underlying silicon cell is under the responsibility of Professor Shen Hui and Sun Yat-sen Institute of Solar Energy, Sun Yat-sen University. Bionic petal trapping film technology was developed by Dr. Zheng Zijian, Department of Textiles and Clothing Technology, Hong Kong Polytechnic University.
He said that perovskite/monocrystalline silicon tandem solar cells can be widely used in the field of integrated solar energy including high-rise buildings, rural rooftops, and urban shading covered bridges. Its research team will continue to strive to enhance the perovskite in the future. The energy conversion efficiency of the silicon tandem solar cell further develops a large-area perovskite/silicon tandem cell, and focuses on solving the problem of material stability in order to promote this research achievement as soon as possible. (Reporter Sun Zifa)
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