In the journal Nature Photonics published on the 16th, researchers at Princeton University published a paper saying that they have developed a new technology that creates lower cost, higher efficiency and better performance by adding organic ammonium halide. Stable perovskite light-emitting diode (LED). In the past 10 years, the application of LED has become more and more extensive. Its energy saving, environmental protection, long life and small size, but the manufacturing cost is relatively high. Reducing the LED manufacturing cost is an important goal of the relevant industry. Perovskite is an ancient material, first discovered in the Russian Ural Mountains in 1839, named after the Russian mineralogist Lev Polovsky (the name of perovskite is Perovskite). This material is mostly cubic or octahedral and has peculiar properties. It can be either a semiconductor or a superconductor, depending on its structure. As a new functional material, perovskites have great potential for development in the fields of environmental protection and industrial catalysis. In recent years, it has received continuous attention due to its application in the field of solar cells. Organic-inorganic hybrid perovskite materials have also been considered by many scientists as substitutes for LED preparation materials such as gallium nitride, but the two disadvantages of low film formation efficiency and low stability have constrained their application in the LED field. This time, new technologies developed by researchers at Princeton University have solved this problem. In their paper, they said that in the manufacture of perovskite film, the addition of organic ammonium halide in the perovskite solution, especially the long-chain organic ammonium halide, will make the perovskite crystal particles much smaller, and the resulting perovskite film. Thinner and smoother. Such a perovskite film means better external quantum efficiency, which makes the LED more efficient and more stable. Compared to silicon and other LED preparation materials, perovskites are cheaper and the preparation process is simpler. Researchers say the new technology will accelerate the commercial application of perovskites in the lighting, display, and laser fields, making future LED products more efficient and cheaper.
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