However, similar to perovskite solar cells, the poor device stability of perovskite LEDs stands as the grandest challenge toward commercial applications. Typical lifespans of perovskite LEDs are on the order of 10 to 100 hours. In contrast, the minimum lifetime required for an OLED display is 10,000 hours. Researchers face great difficulty reaching this threshold, as halide perovskite semiconductors might be intrinsically unstable due to the ionic nature of their crystal structures—the ions can move around when voltages are applied to the LEDs, leading to material degradation.

Recently, a research group led by Prof. Di Dawei and Prof. Zhao Baodan at the College of Optical Science and Engineering of Zhejiang University made an important breakthrough in this area. They discovered that by using a dipolar molecular stabilizer, it is possible to make efficient and stable perovskite LEDs with ultralong lifetimes, satisfying the demands of commercial applications. The research was carried out in collaboration with the research groups of Prof. Li Cheng at Xiamen University, Prof. Hong Zijian at Zhejiang University, and Prof. Li Weiwei at NUAA and formerly at Cambridge University. A paper titled "Ultrastable near-infrared perovskite light-emitting diodes" was published by the researchers on 8 August 2022 in Nature Photonics.