The new additive 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).

Over the past 10 years, LED is used more and more widely, its energy saving, environmental protection, long life, small size, but the cost is relatively high, reducing the manufacturing cost of LED is an important target of related industry. Is an ancient perovskite material, was first discovered in 1839 in the Ural mountains of Russia, named for the Russian mineralogist Lev Polovskiy (the name is English perovskite Perovskite). This material is cubic or eight surface, with unique properties. It can be a semiconductor, can also be a superconductor, depends on its structure. As a new type of functional materials, perovskite have great potential in environmental protection and industrial catalysis. In recent years, and has drawn much attention due to its application in the field of solar cells.

Organic inorganic hybrid perovskite materials has also been a lot of scientists as LED Gan materials preparation alternatives, but the film has low efficiency, stability is not high the two disadvantages restrict its application in the field of LED. The Princeton University researchers have developed new technology to solve this 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. This means that while the perovskite thin film external quantum efficiency better, the efficiency of the light emitting diode is higher, the stability is better.

Compared to silicon and other LED preparation materials, perovskite cheaper, the preparation process is simple. The researchers said the new technology will accelerate the commercial application of perovskite in lighting, display, laser field, the future LED products more efficient and cheap.

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