New additives make perovskite LEDs more stable, efficient, and cost-effective
Published Time:
2021-08-04
Researchers from Princeton University published a paper in the journal Nature Photonics on the 16th, announcing the development of a new technology to produce lower-cost, higher-efficiency, and more stable perovskite light-emitting diodes (LEDs) by adding organic ammonium halides.
In the edition of Nature Photonics published on the 16th, researchers from Princeton University in the United States published a paper stating that they have developed a new technology to produce lower-cost, higher-efficiency, and more stable perovskite light-emitting diodes (LEDs) by adding organic ammonium halides.
Over the past 10 years, the application of LEDs has become increasingly widespread. They are energy-efficient, environmentally friendly, long-lasting, and small, but their manufacturing costs are also relatively high. Reducing LED manufacturing costs is an important goal for the relevant industry. Perovskite is a relatively old material, first discovered in the Ural Mountains of Russia in 1839, and named after the Russian mineralogist Lev Perovski (the English name for perovskite is Perovskite). This material is mostly cubic or octahedral and has unique 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 environmental protection and industrial catalysis. In recent years, it has received continuous attention due to its application in solar cells.
Organic-inorganic hybrid perovskite materials are also considered by many scientists as alternatives to LED preparation materials such as gallium nitride, but the low film-forming efficiency and low stability have hindered their application in the LED field. This time, the new technology developed by Princeton University researchers solves this problem. In their paper, they stated that adding organic ammonium halides, especially long-chain organic ammonium halides, to the perovskite solution during the manufacture of perovskite films will result in much smaller perovskite crystal particles, producing thinner and smoother perovskite films. Such perovskite films mean better external quantum efficiency, which will make the light-emitting diodes more efficient and stable.
Compared with silicon and other LED preparation materials, perovskite is cheaper and the preparation process is simpler. The researchers said that the new technology will accelerate the commercial application of perovskite in lighting, display, and laser fields, making future LED products more efficient and cheaper.
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