China develops smallest LED display with 90-nanometer pixels

Chinese scientists have created the world's smallest LEDs, with pixels measuring just 90 nanometers wide. These tiny lights use a material called perovskite, which has the potential to revolutionize high-resolution displays in electronic devices. Typically, micro-LEDs, made from II-V semiconductors, are used for such small pixels. However, making micro-LEDs can be costly and complicated. To address this issue, Baodan Zhao and her team at Zhejiang University turned to perovskite, a material also being explored for solar panels. The researchers developed what they call nano-scale LEDs or nano-PeLEDs. They discovered that these perovskite-based LEDs stay bright much longer than traditional options, which often fade quickly. Perovskite has a unique crystal structure that makes it inexpensive and simple to produce. It is highly effective at absorbing and emitting light, making it a valuable material for LEDs. This breakthrough signals a new era in LED technology, offering potential for sharper and higher-quality displays.