According to the US Daily Science website, scientists from the University of Michigan have demonstrated that organic solar cells have a photoelectric conversion efficiency as high as 15%. The new results will further promote the commercial use of more flexible and cheaper solar cells. The researchers estimate that if the organic solar cell's photoelectric conversion efficiency can reach 15% and its service life reaches 20 years, its power generation cost is only 7 cents per kilowatt-hour. According to data from the US Energy Information Administration, the average power generation cost in the United States in 2017 was 10.5 cents per kilowatt-hour. Organic solar cells have many advantages over traditional inorganic batteries. Silicon-based inorganic solar panels are expensive to manufacture, but carbon-based organic solar cells can be made cheaply into rolls. These rolls are thin enough to bend and twist in buildings or clothing, and can be made into any color, even transparent, In order to match the surrounding environment. However, the photoelectric conversion efficiency of organic solar cells is relatively low, and it can only be used in the competition with ordinary energy sources. The first author of the study, Car Xiaozhou, said: "Over the past few years, its photoelectric conversion efficiency has been hovering around 11% to 12%." In order to make breakthroughs, researchers gathered a number of advances in design and craftsmanship. First, they designed a system that combines dedicated layers to absorb visible and infrared light. In essence, they stacked two organic solar cells—one that absorbs light in the visible spectrum starting at 350 nanometers; the other absorbs near-infrared light at wavelengths up to 950 nanometers. Cha Xiaozhou said: “The photoelectric conversion efficiency of the battery itself is 10% to 11%. When they are stacked together, the light absorption increases. In addition, we also use an anti-reflective coating to increase the efficiency to 15%.†The team also proved that their new designs, materials and process manufacturing yields as high as 95%, which is very important for extending the manufacturing process to the industrial level. Researchers believe that conversion efficiency can be further improved. Che Xiaozhou explained: “You can increase the current by improving the absorption of light, and minimize the energy loss, thereby increasing the voltage. The calculation results show that the photoelectric conversion efficiency of such equipment can reach 18% in the near future, which will help Solar energy has become a truly ubiquitous source of clean energy." The research was published in the latest issue of Nature & Energy magazine. (Liu Xia) P20*P20 Transparent LED Screen P20*P20 Transparent Led Screen,P20 Led Transparent Display Screen,P20 Transparent Led Screen,Transparent Led Display Shenzhen YuGuang New Material Co.,Ltd , https://www.ygsmartfilm.com
U.S. organic solar cells record a record of photoelectric conversion