Recently, researcher Liu Shengzhong and Ph.D. Wang Kai of the Thin Film Solar Cell Research Group of Dalian Institute of Chemical Physics, Chinese Academy of Sciences prepared perovskite solar energy by using slit coating preparation method combined with high-pressure nitrogen extraction and ionic liquid passivation perovskite interface technology. The battery has a small area efficiency of 22.7% (0.09cm2) and a large area component of 19.6% (7.92cm2). The slit coating technology has become one of the deposition technologies with industrialization prospects in the field of perovskite solar cells due to the advantages of low cost, large production volume, and good continuity. However, for the large-area preparation technology of perovskite thin films, how to control the uniformity of large-area thin films (about 500 nm in thickness) and reduce the defect density of the thin films are still challenging. Researchers use slit coating deposition technology, combined with high pressure nitrogen-extraction strategy, to effectively control the nucleation and grain growth of perovskite films, and drive the formation of stable mesophases, so as to achieve uniform deposition and preparation Dense perovskite film. Research has found that slit coating deposition combined with high-pressure nitrogen extraction technology can achieve wide-window and large-area printing of perovskite films and improve device yield. In addition, in order to effectively reduce the surface defects of perovskite, it is studied to use ionic liquid to effectively passivate the surface to increase the efficiency of small-area solar cells to 22.7%, and to extend this strategy to large-area solar cell manufacturing. The steady-state output efficiency of the perovskite battery module prepared on a 40mm2 substrate reached 19.4%. The study shows that slit coating printing combined with high-pressure nitrogen extraction technology is a high-efficiency, wide-window, low-cost, and expandable area perovskite solar cell preparation technology, which is beneficial to promote the development of slit coating deposition technology. Promote the application of this technology in mass roll-to-roll continuous deposition. Relevant research results were published on "Advanced Materials". The research work has been supported by the Strategic Key Research Project of the Chinese Academy of Sciences, the National Natural Science Foundation of China, the Liaoning Ph. "), the Chinese Academy of Sciences' knowledge innovation project, etc. Ip Camera Pro,Hd Ip Cameras,2.0Mp Hd CCTV Cameras,1080P Hd CCTV Cameras TD Cloud Security Co.Ltd , https://www.cctvcameraexpert.com