Progress in the performance control of inorganic perovskite batteries where Dalian Huafu is located
Recently, the team of Liu Shengzhong, a researcher of the thin film silicon solar cell research group at the Dalian Institute of Chemical Physics, Chinese Academy of Sciences, has made new progress in the performance control of inorganic perovskite batteries, and related results have been published in Advanced Energy Material and Nano Energy.
Organic-inorganic metal halide perovskite solar cells have attracted widespread attention due to their high photoelectric conversion efficiency. In recent years, they have developed rapidly and become a research hotspot in the field of photovoltaics. The weak force between them makes the material easily decomposed under the stimulation of external conditions, restricting its further development. In contrast, all-inorganic perovskite materials (CsPbX3, X = I, Br) have become emerging research hotspots in the field of perovskite batteries due to their excellent thermal stability. However, photovoltaic devices based on inorganic perovskite materials are not internal Radiation recombination is more serious, so its photoelectric performance still has much room for improvement.
In order to improve the photoelectric conversion efficiency of inorganic perovskite batteries and actively develop inorganic perovskite performance control strategies, the team Liu Shengzhong and Wang Kai and others adopted different strategies to suppress electronic recombination inside the device. In general, the non-radiative recombination in the device can be divided into two parts: interfacial recombination and non-radiative recombination in the perovskite film. For interface recombination, the team used lanthanide metal bromide to modify the electron transport layer / perovskite interface to form a gradient band structure at the interface to achieve the purpose of inhibiting interface electronic recombination. At the same time, interface modification can strengthen the functional interlayer Interact to promote the process of electron dynamics. Based on this strategy, the team improved the performance of the CsPbIBr2-based perovskite battery to 10.88%, which is at a relatively high level in this field. For non-radiative recombination in the perovskite film, the team adopted a strategy of metal barium ion doping to suppress this In a process, it was found in the research that although the barium ion radius does not meet the requirements of the Goldschmidt geometric law, it can still improve the photoelectric performance of the perovskite material and improve the device stability. This study shows that the perovskite material has a higher tolerance to metal hetero-ions. The above work provides a basis for the performance control of inorganic perovskites and promotes the development of inorganic perovskite batteries to a certain extent.
This work was supported by the National Key Research and Development Program, the Central University Fundamental Research Fund, the National Natural Science Foundation of China, the Liaoning Provincial Doctoral Fund, the 111 Project, and the Yangtze River Scholars Innovation Team Project.
Hexagonal Wire Mesh,Hexagonal Net,Galvanized Hexagonal Wire Mesh,Hexagonal Steel Wire Mesh
ANPING HONGYU WIREMESH CO.,LTD , https://www.hongyufence.com