China advances next-gen lighting with more stable perovskite LEDs

Chinese researchers led by Professor Xiao Zhengguo at the University of Science and Technology of China have developed an innovative all-inorganic perovskite film that significantly enhances LED performance. By introducing specially selected compounds and applying a high-temperature annealing process, the team engineered perovskite films with larger crystal grains and fewer defects. This structural improvement facilitates better charge transport, resulting in LEDs with unprecedented brightness of 1.16 million nits and an extended operational lifespan exceeding 180,000 hours. These advancements overcome previous limitations where perovskite LEDs had short lifespans and low brightness, making them unsuitable for practical applications. The new perovskite LEDs also demonstrate a luminous efficiency surpassing 22%, comparable to current commercial display technologies, and brightness levels far exceeding typical OLED and LED screens, which usually peak at a few thousand nits. Such high brightness and durability make these LEDs promising for outdoor displays and specialized lighting requiring strong visibility. When operated at a standard brightness of 100