Xinhua News Agency, Shanghai, September 14 (Reporter Chou Yi) The reporter learned from Shanghai Jiaotong University that under the unremitting efforts of Professor Han Liyuan, the State Key Laboratory of Metal Matrix Composites, Institute of Materials Science and Engineering, the researchers applied more economical and safe Method to prepare a large-area perovskite thin film that is ten times thinner than onionwing is an important step towards the goal of large-scale and low-cost solar power generation. Related achievements recently published in the internationally renowned academic journal "Nature" online. Shanghai Jiaotong University, Japan Institute of Materials and Materials, Suzhou New Energy Technology Co., Li-yuan, the Federal Institute of Technology in Lausanne, Switzerland for the cooperation of research units. At present, solar photovoltaic cells are expensive to produce and have complicated processes. For the first time in 2009, perovskite materials are used in photovoltaic technology and are regarded as one of the most promising PV technologies for low-cost power generation. However, this new technology into practical application of the premise is that the key part of "perovskite material film" area is large enough, the quality is good enough, in order to ensure the photoelectric conversion efficiency of the battery. Polysilicon solar cell photoelectric energy conversion efficiency of about 21%, and at this stage more than 20% certified efficiency of perovskite solar cells can only reach 0.04 square centimeters to 0.2 square centimeters, as big as a grain of rice, and rely on the existing preparation Technology, the larger the perovskite film area, the more prone to flaws, the lower the efficiency of the battery. Researchers in the three-year time, continue to explore innovative film preparation methods, the preparation of large-area high-quality perovskite film based on the development of an effective area of ​​36.1 square centimeter perovskite battery module, the first time in the international certification body 12.1% certification efficiency, setting the world record for the efficiency of the first large-area perovskite module. This result means that perovskite photovoltaic technology is expected to walk out of the laboratory and realize the possibility of large-scale industrialization in the future. It is reported that researchers will work hard to tackle the problem and strive to make the conversion efficiency of the perovskite battery module reach the current level of the current silicon solar cell, and further investigate the stability of the perovskite battery.