New additive makes perovskite LED more stable and efficient

Washington, January 16, published in the 16 Journal of natural photonics, the Princeton University researchers published a paper saying that they developed a new technology, by adding organic ammonium halide, producing a lower cost, more efficient and more stable performance of the calcium titanium light emitting diode (LED).

In the past 10 years, the application of LED has become more and more widely, and its energy saving, environmental protection, long life and small volume, but the manufacturing cost is relatively high, reducing the cost of LED manufacturing is an important target of the industry. Perovskite is an ancient material that was first discovered in the Ural mountains of Russia in 1839 and named for the Russian mineralologist Lev Polovskiy (the English name of perovskite is Perovskite). The material is a cube or eight - faced body 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 potential in the fields of environmental protection and industrial catalysis. In recent years, because of its application in the field of solar cells, it has been paid more and more attention.

Organic-inorganic hybrid perovskite materials have also been regarded by many scientists as a substitute for LED materials such as gallium nitride, but the two disadvantages of low film forming efficiency and low stability restrict its application in the field of LED. This time, the new technology developed by researchers at Princeton University has solved this problem. In the paper, they said that the addition of organic ammonium halide in perovskite solution in perovskite solution, especially the long chain organic ammonium halide, will make the perovskite crystals smaller and the perovskite thin film is thinner and smoother. Such Perovskite Thin Films mean better external quantum efficiency, which will make the LEDs more efficient and more stable.

The perovskite is cheaper and the preparation process is simpler than that of silicon and other LED materials. Researchers say the new technology will speed up the commercial applications of perovskite in the fields of lighting, display and laser, making future LED products more efficient and cheaper.

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