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The reporter learned from Nanjing University of Technology on the 27th that academicians Huang Wei and Professor Wang Jianpu have innovatively designed and fabricated a perovskite LED with a multi-quantum well structure. The efficiency and stability of the device far surpass international reports. Other perovskite LEDs have opened up entirely new directions for perovskite materials and their research in the field of luminescence.
The external quantum efficiency of LED devices prepared by the team has reached 11.7%, which is the world's highest record for perovskite LEDs. This important research result was published on the 26th of September in the international top academic journal Nature Photonics.
Current OLED devices have low efficiency, lack of stability, and high manufacturing cost, which limits the scope of OLEDs to expand applications. The high-efficiency perovskite LED process is more simple, low-energy, and has strong affinity for materials. The field has opened up new research directions. After it is industrialized in the future, it will have a broad market prospect.
According to Professor Wang Jianpu, the high-performance perovskite LEDs they developed contain organic-inorganic hybrid perovskite materials that combine the advantages of organic and inorganic semiconductor materials. They have two advantages: First, they are usually inorganic LED tubes. Point-type lighting, can not do the display, only OLED can do the display, but the perovskite LED is different from the traditional inorganic LED, can do the display, and the image is more vivid colors. Second, the advantages of perovskite LED applications in lighting are also obvious. It changed the traditional LED indoor lighting spotlight to surface light, so that the indoor light is not harsh, closer to natural light, increase comfort. Conventional inorganic LEDs can only do small areas, but the results can be used to make a similar area with a large ceiling, and compared with the traditional inorganic light-emitting materials have the advantages of low defect density, high luminous efficiency, and good color purity. (Reporter Zhang Yan correspondent Yang Fang)
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