The new additive makes perovskite LED more stable and efficient

Washington on 16 January, in the 16 published "nature photonics magazine", Princeton University researchers published a paper, they developed a new technology, by adding organic ammonium halide, producing perovskite lower cost and higher efficiency and more stable performance of the light emitting diode (LED).

In the past 10 years, LED has been used more and more widely. Its energy saving, environmental protection, long life and small size, but the manufacturing cost is relatively high, and reducing LED manufacturing costs is an important goal of related industries. Perovskite is an ancient material. It was first discovered in the Ural range in Russia in 1839. It was named after Russian mineral scientist Lev Polovskiy (the English name of perovskite is Perovskite). Most of these materials are cubes or eight faces, and have peculiar properties. It can be either a semiconductor or a superconductor, depending on its structure. As a new type of functional material, perovskite has great potential for development in environmental protection and industrial catalysis. In recent years, it has been paid close attention to because of its application in the solar cell field.

Organic inorganic hybrid perovskite materials have been regarded by many scientists as substitutes for LED preparation materials, such as Gan, but these two defects restrict their applications in the field of LED, because of their low efficiency and low stability. This time, the new technology developed by researchers at Princeton University solved the problem. They said in the paper, in the manufacture of Perovskite Thin Films, the addition of organic ammonium halide perovskite in solution, especially long chain organic ammonium halide, the perovskite crystal particles smaller, perovskite thin films made of thin and smooth. And such perovskite films mean better external quantum efficiency, which will lead to higher efficiency and better stability of light-emitting diodes.

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

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