<p>➀ Researchers at the University of Science and Technology of China developed a new material design for red perovskite LEDs (PeLEDs), solving efficiency loss at high brightness;</p><p>➁ The team used a 3D intragrain heterostructure with p-Toluenesulfonyl-L-arginine (PTLA) to confine charge carriers and minimize leakage;</p><p>➂ Achieved record-breaking performance: 24.2% external quantum efficiency, 24,600 cd/m² luminance, and 127-hour operational stability.</p>