New additives make perovskite LEDs more stable, efficient and lower cost
In the "Nature· Photonics" published on the 16th, researchers from Princeton University in the United States published a paper saying that they have developed a new technology by adding organic ammonium halide to manufacture A perovskite light-emitting diode (LED) with lower cost, higher efficiency, and more stable performance was developed.
In the past 10 years, LEDs have been used more and more widely. They are energy-saving, environmentally friendly, long-lived, and small, but their manufacturing costs are relatively high. Reducing LED manufacturing costs is an important goal of related industries. Perovskite is an ancient material. It was first discovered in the Ural Mountains of Russia in 1839. It was named after the Russian mineralogist Lev · Polovsky (the English name of perovskite is Perovskite). This material is mostly cube or octahedron, with peculiar properties. It can be a semiconductor or a superconductor, depending on its structure. As a new type of functional material, perovskite has great development potential 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 are also regarded by many scientists as substitutes for LED preparation materials such as gallium nitride, but the two shortcomings of low film formation efficiency and low stability restrict their use in the LED field. application. This time, a new technology developed by Princeton University researchers solved this problem. They stated in the paper that adding organic ammonium halides, especially long-chain organic ammonium halides, to the perovskite solution when manufacturing perovskite films will make the perovskite crystal particles much smaller, resulting in a perovskite film. Thinner and smoother. And such a perovskite film means better external quantum efficiency, which will make the light-emitting diode more efficient and more stable.
Compared with silicon and other LED preparation materials, perovskite is cheaper and the preparation process is simpler. Researchers claim that the new technology will accelerate the commercial application of perovskite in the fields of lighting, display, and laser, making future LED products more efficient and cheaper.
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