The reporter recently learned from Hebei University that Dr. Chen Jianhui, a young teacher of the photovoltaic technology research group of the School of Physics of the school, has worked hard to explore, overcome the technical obstacles of high temperature and vacuum heavy equipment, and constantly open up new research directions in the field of crystalline silicon surface passivation to give the future To further reduce the manufacturing cost of silicon solar cells provides a scientific basis and technical ideas. Reducing costs and improving conversion efficiency are the eternal themes of the photovoltaic industry. The key technology of silicon solar cell industrialization-high temperature or high vacuum doping and dielectric film passivation has improved the conversion efficiency of the battery to close to the theoretical limit, but the high temperature and vacuum technology seriously restrict its further cost reduction. It is reported that Chen Jianhui and others have discovered that polymer films with sulfonic acid groups have a high-quality passivation effect as early as 2017, exploring a low-cost technical route for the passivation of crystalline silicon surfaces, and also opening up crystalline silicon A new research direction in the field of surface passivation-new polymer passivation technology. Recently, Chen Jianhui and others have discovered that low-dimensional conductive materials can be well combined with organic passivation technology to achieve the dual effects of conductivity and passivation. They obtained the conduction-passivation phase diagram through related technologies, discovered the "conduction-passivation coexistence phase", and proposed the concept of "conductive passivation contact", which scientifically solved the "conduction non-passivation, passivation The "non-conducting" contradiction makes the silicon solar cell technology achieve two physical effects at the same time using only a single layer of film, greatly simplifying the manufacturing process. The process is initially applied to polycrystalline silicon cells, achieving a cell efficiency of 18.8%, which is comparable to industrial data, but the process no longer involves high temperature and vacuum technology. Related results have been published in "Advanced Energy Materials". Wan Lu, a graduate student of the School of Physics, is the first author, and Chen Jianhui is the corresponding author. At the same time, they cooperated with the Karlsruhe Institute of Technology in Germany to apply organic passivation technology to carbon nanotube silicon heterojunction batteries, and proposed the concept of "carrier selective contact with the passivation concept function" to achieve the same kind The breakthrough of the highest efficiency and largest area record in the battery further confirms that "low dimensional + organic passivation" is a new high-efficiency battery technology with great potential. Related results have been published in "Advanced Functional Materials", and Chen Jianhui is the first author and co-corresponding author of the paper. (Gao Changan Yu Dongwei) Magnetic rods are exploited in industries or sectors where purification of materials is a requirement to achieve optimum quality. This type of separator rods is used for removal purpose of tramp metals from processed liquids and dry materials. This is one type of separator which assists in the removal of ferrous contaminants from areas which are difficult to clean. Engaged as Magnetic Rod suppliers our responsibility becomes even more critical as we need to validate and check all the materials coming out of the manufacturing units. As part of the process of attaining quality products, the separation rods are made to be placed at critical points of the equipment. Magnetic Rod Magnetic Rod,Filter Magnetic Rod,Standard Magnetic Filter Bar,Magnetic Sheet,Magnetic Bars Jinyu Magnet (Ningbo) Co., Ltd. , https://www.magnetbonwin.com
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New ideas can reduce silicon solar cell manufacturing costs